GC had an interview with Scott Johnson and they revealed some pretty interesting stuff about lvling and other stuff (I believe custom skin was mentioned as a nice thing they want to add for new models)
Anyway they also mentioned that we won't have flying from 90-100... ANd might not even have flying in draenor until patch 6.1, mostly because they want the world to feel dangerous and such things .
Also speaking of leveling Tom Chilton confirmed there will be no REALM FIRST lvl 100 achievements. It was for the virtual ticket close to the end of day 2, same interview that he revealed the release date for the movie. (not the curse fan question stuff or whatever it was a personal one between Metzens wife and Chilton and some other guy).
Here is some music from youtube as well even though it exists on the website for WoD.
^is the guy that will publish the interview.