I've just hit level 15 myself and have begun exploring Orobas FJords. Much like Enflure, I'm also experiencing a very significant rise in the amount of XP given for monster kills. Going from 17 xp with skeletons in the Broken Valley to 3894 xp for the first couple of goblin shamans does seem a little exaggerated, but I'm not complaining, as I must have levelled up after the fourth kill. :)

edit: And twenty minutes later, I'm level 19. Hmm. I'd better go back and do some more main plot I think. ;)