As Yoda would say, "and that... is why you fail."

Yeah locks haven't been OP since S1 and druids are only OP in 2v2 due to some flaws in arena design + class synergy (mace stun warrior). The recent nerfs have gone a long way to correcting this. When normalized by class population (see the sites listed below)there are 80% less druids in 2200+ 2v2 post 2.4 (200% representation down from 280%) and in 3v3 it is down to 130% from 184% -Oh, and they still fail in 5s. Now add in the resto nerfs in the last patch you will likely see them drop some more.

Personally I think you will see all healers drop off a bit in S4 with the insane dps scaling. Pallys might even become viable 3v3 healers :P (only half joking, they really could)

You can look www.realmhistory.net and www.warcraftrealms.com to basically get the same data blizzard posted a few months back. I know they aren't 100% but they are the best public ones I know of.

I actually stopped reading there, too.

Warlocks = OP?
Druids = OP?
Dead Horse = Beaten

LOL haters out there

The truth hurts. What ever attempts that have been made to reduce the OP-ness of druids and locks is only a step along the way imo. I say that as a person who plays a lock and a druid among other classes. a lock with a fel hunter can pretty much own most casters. druids with 5x stacking lifeblooms, shapeshifting out of all CC, their own cc that is undispellable...well, needless to say it's a damn hard fight to over come that.