on my former Battlegroup (Emberstorm EU) Alterac Valley NEVER started more than once a day, and my ally side normally lost that only one chance
to get my Battlemaster title I moved on Ravencrest (Cyclone EU), still ally side
I still lose a lot of AV, but at least the queues are INSTANT for every battleground (actually I didn't try IoC, not really care of that one)