It is incredibly fast currently and incredibly boring too. I am all for the "slow down and smell the roses" mentality when it comes to leveling, but in this game, at least currently, there aren't many roses to smell while leveling. You just wanna get it over with ASAP and it allows you to. I hope questing and exploration is a lot more fun and appealing in 2.0 so leveling is a by product of smelling the roses rather than a chore like it is now.