In my last battlegroup Nightfall, the Alliance almost always had 2-4 healers. The horde were lucky to get 1 or 2. Many times there were very few decent horde players, and the one or two good players could usually do nothing against the other team with multiple healers sticking together.
The games were pretty evenly match if horde had enough decent players, as they were able coordinate enough burst/cc to down flag carriers or healers. Alliance also seemed to stick together more -- I think because of the healers. Does anyone notice something similar in this battlegroup?