Gratz! :celebration:
That's the thing, I thought changes to the races' models was going to be part of Cata. It's a big enough change that it'd pretty much have to be in an expansion IMO. And it's not like they just started on Cata, it's been in development for a while now -- maybe they've already been working on models, like they've already tweaked Thrall and whomever else. It couldn't be an afterthought, it'd have to be worked on at the same time as the rest of the content...if it's in the expansion after Cata (if there is one), it would make sense that all that work would have already started (probably by the first time the issue came up), but just isn't complete in time to be included with Cata.
The rumour mill ( I seem to remember a blue post alluding to this) is that they want to do it, but aren't prioritizing it now due to all the other work they need to do on Cata, what I heard was that they were cosidering doing it as a free content patch actually. Though that is speculation, blue post or not. Still, I'm pretty sure it's coming eventually, look at Goblins and Worgen compared to Draenei and Blood Elves. There's a pretty noticeable difference in quality, and Draenei and Blood Elves were miles ahead of the vanilla races already, so it seems like a no-brainer, and it's absolutely in demand. Blizzard has made mistakes like everyone else, but one thing they do right is listen to their fans.
I remember a while back a thread on barber shops were started, I was a huge advocate for that and supported that thread like all hell, when that made it in I was so happy, I've probably spent thousands of gold on haircuts alone
EDIT: Okay, http://www.wowbash.com/images/1281835915.jpg