Not sure. I will say that out of all the games I've PvP'd in (DAoC, WoW, EQ2, SWG, Warhammer, AA), the PvP in SWTOR "feels" the best from an actual mechanics standpoint, though it's clearly last place in a "meaningful PvP" standpoint. It also has the best PvP map (imo) ever created in Huttball...