In AV I get about 95% positive response. It could be because I'm all 80 and starting to have decent PvP gear. Other BGs it's only about 50% positive, though I haven't been back since my gear upgrades (at least 5 pieces since).

With 5 80s you can turn the battle in AV. Typically I kill Galv with the group which gives time for horde to cap the first tower. I go and recapture our tower in which time they've capped the second tower. I go recap the second tower, return to the first if they capped it again, and then head down to Drek. With 5 moonkins healing the tank, as long as they can hold aggro I can keep them up with adds with ease. In the end I've delayed horde by a good amount of time by recapping towers and resetting their time and then allowed Drek to die earlier than normal. Of course, this all requires a tank... which isn't given in the new AV.