Dont you think if they halved the exp gain across the board it would royally fuck up the leveling system? I was a little perturbed when I finally figured out my hunter needed to be level 10 before he could have any pets. In the end it wasnt too bad though, it only ended up taking me a night and an hour or so the next day to get it. I can speculate that it would have been kind of shitty if it were to take me double the time.