Valley of the Four Winds - When you hit the quest that sends you to the bridge near Karasang Wilds, go there and do the quests until you hit the middle of the zone. MAKE SURE YOU BIND IN 4W NEAR WHERE YOU LEFT OFF TO HEARTH BACK.
Once you finish off half of Kasang Wilds, hearth back and complete the 4W quests up to the Halfhill Market hub. By this point, you should be 87 and heading towards Kun-Lai Summit.
Kun-Lai Summit to 88 - You'll do a majority of the quests here but they give far more xp than KW and 4W.
Townlong Steps to 89 - Once again, you'll do most of the quests here until you hit 89.
Dread Wastes to 90 - Once agian ;p, you'll do most of the quests here till you hit 90. It is important because you want to unlock the dailies with the bug people so doing all the quests here isn't that bad since you get something for it .
My times leveling up were around 14 hours but since we had the problem with the intro quest and 400 people shooting the ship, it added 30 min. Also, I was bugged in a dungeon and couldn't reque for 30 min, we all got punted as we zoned in, and that hurt a lot.
IMO this is a fast track in questing and it's easier to go back and do your old quests with flying. I am already a Loremaster of Pandara and it didn't take long.
Any questions you can contact me in game if you want.