With full pvp gear there seems to be around 50% net damage reduction, factoring pvp res/power.
Mages one shoot people in a single deep freeze again and healing is more potent than ever overscaling with pvp power, even health % based heals are double diping with pvp power.
Shields like icebarrier, pw:s still absorbing for ridiculous broken amounts in super short cooldowns, almost spammable for mages considering their insane avoidance.
I think we should rush blizzard to get at least pvp ability/stats scaling right or this game is gonna take a huge hit from GW2, people are going to throw the towel from wow pvp i am not pessimistic but the picture is looking really really grimm, not a single day of proper pvp testing since beta started, really depressing.