My post was as much a complaint as yours was.
So everybody else posts mainly to disagree, but you post mainly to complain?
To the OP:
What level are you? On my first toon, level 30-40 seemed slow. I believe this is due to the fact that around that time, how the class plays changes. For many specs, that is the first time signature abilities are unlocked (e.g. Precision Slash, Barrage, Emergency Medpack, etc), that really affect how the class plays. If you don't master those, it takes much longer to kill the mobs, extending the grind.
Remember that most of your xp comes for turning in quests, as opposed to killing mobs.