You're neglecting the fact that with his PvP my damage is mostly negated whilst his damage on me isn't. (Legendary Cloak doesn't work vs players/meta proc is a chance like any other so discounting that as favorable RNG luck).
Also ilvl563 is kind of high even for core raiders you are more thinking of 540~ for the normal mode raiders which is more fair (given your pvp gear will go up soon'ish)to make a fair comparison myself I'm at 550 even Vykina (Methods best mage) is only 565 geared (
http://eu.battle.net/wow/en/characte...ykina/advanced) you're taking massive extremes of gear unfairly.
Stats wise yes I have the advantage but only if you can keep the target at range which you can't really vs a warrior these days on top of that pvp trinket which is a BIG deal from the mage PoV. Base resilience I believe doesn't work in world pvp (correct if wrong) so therefore I take double the damage than the guy in pvp gear takes even with my pve gear he would hit me harder.
@Zant - I don't understand the gank groups personally, it's counter productive I always run solo.