I thought the initial leveling process seemed to really drag out but 88-90 seemed faster than before. I love the new zones and the dungeons are nice and casual so I don't have to only do heroics with certain friends and not others. In Cata I couldn't do heroics early on with a third of my friends who were a bit more casual towards gearing an proper rotation than I was.
Anyway, I haven't played WOW in 4 months or so and am enjoying new content again with friends like I figured I would. Worth the money.
Alliance - Uldaman