Pandaria XP Requirements Nerfed as Far as I Can Tell

There's no official announcement that I've seen, but it looks like the XP required to go from 85 to 90 has been significantly nerfed. I was able to take my Goblin Hunter, Blattz, from 86 to 90 in about a day - only a couple of hours played.

This shouldn't be to surprising - the pattern has been that XP requirements get nerfed each expansion to account for the new level cap. Blizzard's general rule is that getting from level 1 to whatever the current cap is should take roughly the same time regardless of what that cap is. So while in vanilla it took a good long while to get up to 60, it should take significantly less time to do so now with a level cap of 100 on the horizon (approximately 60%, though I imagine less, because the expansion-areas are designed to take a little more time per level than the old world stuff. You should be able to get to level 10 in only an hour or two, but to go from 70 to 80 is a more significant feat that would typically take at least a few days.)

The only reason that this might be seen as odd is that Mists already received an XP requirement nerf some time in the early patches - I want to say 5.1 or 5.2. I had also worried that they might retire this periodic XP nerf in favor of the character boosts. That does not seem to be the case, though I'll have to see how things are working out at lower levels to see what things are like down there (and I'm running out of pre-Outland characters on my main servers.) The only real downside to these constant XP nerfs is that at this point it's impossible to do all the quests in a zone without the enemies being utterly trivial to deal with by the end.

Anyway, the good news is that if you've got a toon to Pandaria, a little diligent questing and dungeon-running will see you leveling up very quickly, ready to either get one last shot at some of the Mists content or ready to storm Tanaan and crush that pesky Iron Horde.

Sidenote: A Murder of Crows is way cooler now! The cool down resets if a target dies while affected by it, which means that when fighting basically anything that isn't a boss, you can have it up pretty much 100% of the time.