It not PvP, but i jumped into a world boss kill today on a couple 101 toons - the enh shammy missed moderately often, but the aff lock only landed about 5 casts out of more than like 70. I was literally worried about not doing any damage before it was dead. i even tried melee with the lock, but that didnt work much better. lol.
Then right at about 1% he charged across the entire pack of attackers and picked me up and killed me. Good call, Mr World Boss.... focus the guy that did less than 0.05% damage. =/