So a while back, Blizzard introduced a 'matchmaking' system for determining who you would fight against in the battlegrounds. This system was supposed to weigh your gear and whether or not you were joining in a group to determine the matchups.
I played some Arathi Basin today, joining by myself, and six out of six times, I was placed into a battleground with a bunch of random Horde from various servers against a full Alliance guild team!
More weight needs to be given to organized groups. That is much more valuable than gear! Blizzard really needs to pull their heads out of their asses in regards to understanding PvP.