According to the blue posts, there are going to be some mount changes in the next major content patch.  Basically, slow mount at 20, fast mount at 40, flying at 60, epic flying at 70. 

In druiding news this also means that travel form will be trainable at level 16, flight form at 60, and swift flight form at 70.  

I’m not sure how I feel about it.  Honestly, I’m fairly indifferent.  I know that I felt a sense of achievement when my very first toon hit 40 and got my slow mount… way back when.  But you know, back then 60 was the goal, now the goal is 80.  If I was just buying WoW right now for the first time, 80 might seem a very long way off.  I’m not saying leveling up should be a piece of cake, but if people think its not achievable then they won’t play.  

All and all not something that is really going to make much difference to end-gamers, other than slightly speeding up leveling of any alts they may have.