Currently, the XP in AV for the 60's bracket is pretty bad.....and then you will deal against people who have northrend quest gear. My lvl63, 4 druid team with outland quest gear got destroyed pretty easily by single players. I am still learning to play boxed druids, but that is besides the point.

Now, the 70s bracket is a whole different story.....I think XP is still decent there.