Well, it's not quite so insane if you consider that some of these people played the beta, so they already knew how to do the quests, where to do them, and didn't stop to read text or anything. Once they got out of the starter zones, and didn't have to worry about fighting for mobs and quest objectives like in starter zones, it gets easier and easier to level for those who had beta access because there's less wait on mobs. We already have four level 80s on my server, with two 79s on the way there. Which is still a bit insane, but not quite as insane as if there had been no beta.
Still, starter zones are full of annoyances so they were smart to get them out of the way as soon as possible.
My biggest complaint so far is all the people that just -camp- around or on top of questgivers, not only alliance since misclicking calls guards on you...but also all those goddamn mounted tauren fatasses. >_<
Well, that, and people 'stealing' quest items. While, yeah, I know it's perfectly legit to do so, I find it horribly annoying when, hey, I'm dealing with 4-6 enemy mobs around a quest item, because it has a few second cast bar to get it, and can't get it if I'm getting hit, so I need to clear the mobs around it. In runs in someone else, and grabs it, and leaves me with all the mobs.
Worse, I can't even use concecrate because a lot of times, people run in with their -own- mobs, and I grab threat on them when they run in, meaning I end up killing them for them. So not only did I lose a lot of health/mana and possibly a pot trying not to die, I killed something for someone else getting no exp, and didn't get the quest objective for that matter.
Lots of people seem to just also let you do the work on a mob for them, just doing the initial damage so they can loot it. I can thankfully return the favor because most of my spells are instant casts as a shockadin, though. And if I happen to do it accidently, I at least 'apologize' of sorts by tossing the person healing and a buff.
But it gets really annoying when someone does it to you on a mob that respawns only once every 5+ minutes and there's other people trying to get it too. And a lot of people don't want to group, which is dumb because, hey, less competition for the mob that everyone's on.
Still, overall, I'm liking the expansion, since a lot of the quests are really fun, and new areas to explore, and for every twenty assholes, I'm meeting one new person that I can quest with for a while and add to my friends' list.
Plus, get to see some hilarious bugs, like the two tauren mounted on top of two kodos mounted on top of a two-seater mount. That was so freaking awesome, I was laughing for a full minute after watching that.