I'm guessing here, but it might be possible that players with Alliance characters pick a new server and now choose the opportunity to 'try' the Horde simply lured by the Blood Elves. On a PvP server it is not possible to start an Blood Elf if you already have an Alliance character. So if you want to play a Blood Elf many are forced to pick a new server. Now if I was to start a new character I would rather pick a 'recommended' server than a 'full' server.
So did it fix the imbalance? At this point not. The new servers favor Blood Elves because of the new Alliance players looking picking a new side to play, the old servers are stuck with the ratio because of existing playerbases.
 

I find the Blood Elf female character model quite unattractive - far too thin, and she stands like she has back-ache.
On the new servers there may well be more Bloodelves vs Draenei, but I wonder just what mix of character classes there are? I rolled a Blood Elf just to look around the new area, and the character mix seemed to be 40% Warlock, 40% Paladin, and 20% other classes. The lack of Tanks and Healers will be even more acute in the Horde ranks if it carries on like that to lv 70.
The one advantage Horde has in outdoor PvP, is that you can always rely on a target building being available for conquest. As Alliance, the target areas are almost always Alliance-held, which means you can't participate in retaking them very often, and the chances are, that by the time you get there, it will be too late.
Rather than have these buildings stuck out in the middle of nowhere, it would be more fun to have them right outside each others bases, and then there would be more meaning to the events, rather than just taking an empty building in the middle of nowhere, and abandoning it as soon as a little flag pops up on your interface.
 

I think Felsir's comment about PVE vs. PVP servers is an important one. The percentage of people who are going to level a new character(1-70) vs. level their old character(61-70) needs to be taken into account as well.

I play on PVP servers. My main right now is Horde. I started a Blood Elf and levelled to 20 to explore the new areas. That didn't change the ratio on my server because the ratio is account based and on that server I'll always be Horde, no matter what toon I'm logged in as. I also wanted to play a Draenei, so I went to my former server, also PVP, where I had a level 60 Alliance. Again, no chance in the ratio on that server since I'll always be Alliance.

What I did notice is that as a Blood Elf, the zones were FLOODED with new characters. As a Draenei, I ran through large areas of the starting zone and saw no one. /who azuremyst showed only 36 people in the zone at 4 P.M. PST.

In my mind there's a few things at play here: 1) many people are rolling new characters just to experiment. I think any correction in ration due to BEs will be something that happens over time. 2) The perception that Paladin > Shaman. Lots of people wanted to play a Horde Paladin, I didn't hear half as much noise about Alliance Shamans. 3) Ratios on PvE servers need to take into account whether or not a character is a main(if you create an opposite faction character to experiment, should it be counted?) but ratios on PvP servers need to account for playtime (if you only spend a half hour experimenting, should you be counted as part of the ratio?). 4) Where are we in the curve of BC purchases? Has everyone who is going to purchase pruchased? How many new purchasers will start with the new toons vs how many upgraders will reroll and make their main a member of a new race?
 

The lack of Tanks and Healers will be even more acute in the Horde ranks if it carries on like that to lv 70.

I'm not sure this will be true, as the paladin is now quite capable as both a healer and a tank (in 5 mans, and not at the same time obviously). Practically a year ago (way before current and past talent and skill revisions) I was main healing up until Zul'Farrak without much trouble, and I wasn't even holy spec. I have recently been main healing in the Outland instances without backup (and still not holy, although I'll admit it hasn't been easy). My friend has a protection paladin and he's been tanking beautifully. Things will of course depend partly on the willingness of paladin players to spec properly for those roles, and the willingness of groups to let them take those roles.
 

The introduction of Blood Elfs did nothing to win me over to the Horde. I play on a PVE server where Alliance outnumber Horde 3 to 1, and although I would give the BE's the cosmetic win over Draenei, without any new classes, the new races were both kind of a waste IMO.
 

Zero desire to play the blood elf model (I have a blood elf paladin male, with the obligatory female name, on char select, but he's never even made it to the newbie area), and most of the new horde these days are ally alts.

The PvP requirement in Outland, even on PvE servers, really really bothers me. I will never see Halaa, or whatever the city is called in Nagrand, since there's zippo chance of Horde beating the 2 or 3 to 1 ratio currently in place. My priest did the pvp quests in Hellfire for marks to buy the Incendic Rod and Mark of Defiance, but my 'lock never will - there's too many allies around with flying chickens to make it worth the run.

There's a lot I like in BC, but the required PvP to progress, in a known lopsided enviroment, was a bad move.
 

You want to take a city, get 2+ raiding guilds organized and do it.

Strategy, organization, and quick adjustments will beat numbers any day.

The only difference between allies and horde here is that horde players actually have to use their brain and get organized to accomplish any world objectives.
 

I have no desire to take a city, that's why I'm on a PvE server. I shouldn't be denied tradeskill progression by design and sheer numbers. Why should I have to organize 2 raiding guilds to get reciepes when all the other side has to what, show up?

I've got no issue with the 5% damage buff in Plaguelands/Hellfire/Zang/Silithus/etc - if I want that, I can flag pvp and get it. If I don't, my progression doesn't get stopped because of it.
 

Well, after spending some time doing more detailed research, I guess I will partially rescind my previous complaint. According to WoWwiki, the only items now purchasable in Halaa are weapons/armor, food/water, and a bag (18 slotter). The bag and food/water are actually able to be bought without doing any PvP, assuming you own the town.

Additionally, and somewhat humorously, you can't buy much of anything in Halaa if you don't continuously razz the town for pvp marks as the marks from quest rewards are minimal. So if you really wanted the bag, which I would actually, I could bomb the town, take it over, buy it, leave, and never look back. The previously announced "control this town for tradeskill reciepes" either never made it in, or is another zone. I hope it's the former, not the latter.
 

I would give it a month or two more as the casual players will get their horde pallies / alliance shamans fully lvled and geared and you will see less questing and more pvping.

IMo, a casual player takes 2-3 months to hit 70. A more serious player (5+hrs day) would be able to hit the cap MUch faster specially with some guild support.
 

"I'm guessing here, but it might be possible that players with Alliance characters pick a new server and now choose the opportunity to 'try' the Horde"

Ding, ding, ding! Give that man the prize money.

"simply lured by the Blood Elves."

That, and a change of scene. I don't doubt that people who have played a Human Paladin for the past 2 years have now rolled an Undead Warlock or a such on the new servers

- Cosmik
 

There are several dynamics in place that impact Alliance / Horde population.

A couple of obvious factors:
One is that on a PvP server, you're locked into your chosen faction; therefore Alliance players cannot generate BE alts.
Another is that on a Normal server, you're likely to want the support of your main and your guild for your noob toon. Supporting a BE alt with an Alliance main would be cumbersome at best.

It would seem that "old" servers populations will remain Alliance-dominated, while "new" servers may well have a BE-influenced Horde-dominated population. I'm not sure how, or if, Blizz intends to balance this out. As others have pointed out, Outland world PvP content on servers that do not force faction population balance seems like a rather, well, stupid idea.

I'm a Hordie, and play almost exclusively on one server with a network of friends and family. I must admit that I had little desire to start a new toon, but decided to try a male BE Warlock. Sixteen levels later and well into to Ghostland quest lines, I'm having a great time and am very impressed with the new areas - no lack of level-appropriate quests, and a solid (and sometimes humorous) storyline.

Though I can't quite shake the feeling that the BE race, and Eversong Woods, is a spoof on Southern California: A 'beach scene' with self-conscious 'pretty boys' and almost-anorexic bubble-headed valley girls, parties, inner-city-ghetto-style gangs and thugs, people living in a 'pretend world', dances based on Napoleon Dynamite (maybe the male BE is a spoof on a gamer-geek living in a dream world?) and Britney Spears, and probably a lot of other "inside jokes" involving Hollywood and other stuff that I've missed. And there seems to be something of a "Harry Potter" feel as well, too with the focus on magic, the floating vases and the like, and even a magic instructor quest line (I found the 'discipline rod' quest to be quite hilarious) complete with a 'moral of the story'.

But once you hit the Ghostlands there is a marked transition toward the "World" of Warcraft, with the undead allies taking a growing role and the war with various enemies growing in scope and danger. There are plenty of abandoned BE bodies littering the landscape as a reminder of the ramp-up in difficulty.