Hunters are everywhere on both sides. All racials are pretty decent depending on the situation. AoE silence+SP boost, AoE stun, fear trinket on a seperate CD, damage boost, haste boost+HP regen. Ally have 2 min trinket, SM+physical avoidance, hit bonus+%HoT, bleed removal+damage reduction, snare trinket on a seperate CD. There's also expertise bonuses, and of course orcs get it from axes, which just so happen to be BiS both pre and post BoA.
With a fully geared BiS character it's possible to have very comprable stats. The problem goes beyond gear and racials and has become a social one, which is far more difficult to change.
All of the above has nothing to do with what this thread was about though, and that was one person's experience on AP alliance. I just did an AB with 9 warriors on ally side, and ally still won. The problem is that horde PuGs are full of South American junk players, at least when I play.