not tried it but there are threads in the WoWsection of the focums on this from what i have read its not as good as it was and currently on par or just less then questing. BUT i have not tried it in the old or new format for xp in AV.

As said read the Wow discussions.

This is a good thread

http://www.dual-boxing.com/showthread.php?t=24813

Hope that helps.