1 to 60 in less than 24 hours boosting with my RESTORATION specc'd level 76 druid (in his restoration gear even, yes I'm too lazy and cheap to even respec or buy tanking/feral greens) - I'm pretty sure any level 70 plus toon with an aoe button can PL perfectly fine now. I just round up mobs as a tree, with a HOT or two on myself, maybe cat/dash to get a bit ahead of them, then regen/rejuv myself, turn into a bear, and just smash on swipe.

1 - 10 - starter zone quests, should take 90 minutes tops

10-22ish - Shadowfang keep.

You can do this w/out even moving your PL toons from the zone in. First pull to the jail, kill, have guy open door to courtyard. Next run around and round up every single mob up until you get to the ghost commander (don't forget the guys in the kitchen/dining room)- go out past the ghost commander, and out on the ramparts right above where your newbie group is, kill everything (standing at zone in they are still in range for exp). Next run all the way to Fenrous the Devourer, then pull back down past the wolves' room back out onto the rampart, kill there. Jump down, zone out with group, reset, zone in, repeat. You might actually want to pull the rest of the zone after fenrous as I usually run into *you have entered too many instances lately*. Mobs don't run, it's sooooo nice. Takes Maybe 2 hours simply because of zone reset rules.

22 to 45: Scarlet Monestary.

Do Cathedral/Armory. Armory in one pull - gather up all mobs while a tree, with HOTS on, then dash back to beginning of instance, regen/rejuv, bear, swipe. Cathedral in 4 pulls because mobs seem to like to wander back to their spawns here - lower level, upper level, church in two pulls. Takes about 5-6 hours depending upon how much you're into it. Toons should be getting around a level to two levels per reset, and you get the resets down to like 20 minutes pretty fast.

45 - 51/52: Zul-Ferrak

All the running/casting mobs are annoying, but you just have to abuse the LOS corners here a lot to not lose your mind. Pull up to the scarabs while on your horse, pull back to your guys, kill. Pull the scarabs, next kill the whole undead place - it's a lot of great/quick/non-running mob experience. Do the pyramid event, kill the bosses, out, and reset. This actually usually takes me a good 5-6 hours and probably isn't the most efficent way, but it's easy.

52-60 Do the Felwood furlbog quests real quick, get both of the dropped furbolg totems for an easy 50k exp, turn in 30 runecloth to the furbolg guy for another easy 20k exp. I usually do the whole furbolg line to get the 29spellpower trinket, but you can just stop after the first few super easy ones. Then do cauldron runs/runecloth turn ins/East plagueland turn-ins, and grats, you're 60 in less than 24 hours played.