I've done the Dominion tutorial > Crimson Isle starting zone 1-10 leveling so many times that I can get to level 10 in like an 1.5 hours. I might have to take the alternate starting zone (Leviathan Bay) for launch just to change it up heh. After level 10 is where the leveling slows down a bit, takes me almost as much time to get from 10-13 as it did 1-10 I think.