They're reading my mind! Just an hour or two ago I was thinking to myself, "if I can get a mount at level 20 in patch 3.2, what's the point of all those level 20+ speed-increasing skills?" Zarhym has solved my conundrum: they're all going to be reduced to level 16!
This includes Druid Travel Form (was level 30), Hunter Aspect of the Cheetah (or as I like to call it, Aspect of the Cheater; was level 20), and Shaman Ghost Wolf (was also level 20). Also in this post, the skull confirmed that class-specific mounts will come at the same levels as generic mounts will: Paladin and Warlock ground mounts at 20 for normal and 40 for epic, Druid Flight Form (now enhanced to 150% speed, like the other normal-speed flying mounts) at level 60, and Swift Flight Form at level 70.
So the days when Ghost Wolf or Travel Form was all you had to go faster for 20 levels may be over, but at least it will be useful for four. There has been a lot of debate back and forth about these changes, but for my money, if they're not going to let us start alts at high levels, this is the next best thing: making leveling much less painful.