I think I'm going to unofficially rename the latest expansion. Henceforth (or at least until the end of this post), it shall now be known as Attack of the Melee. Let's look at the facts (or at least the QQ's from the forums).
Ret Paladins became gods with the 3.0 patch. Forget about the Hybrid vs. Pure class argument. Paladins just starting kicking everyone's butts. Oh, and did I mention that they're wearing plate as well? Yes, they got normalized, but they're still quite strong.
Death Knights obviously have a draw since they're the new class on the block. Some of the numbers that I've seen them put up in DPS mode is just amazing. And did anyone notice that they're wearing plate?
DPS Warriors have been strong for awhile, in my opinion. They've just continued to keep that strong spot. Again... they're wearing plate.
Enhancement Shammies... I'd really like to be able to comment on these guys. But since we don't have a single raiding Shammy anymore, I really couldn't tell you at all. I can tell you that my level 70 Enhancement Shammy killed a level 70 mob... all by himself. Yep, no lie.
Melee Hunters are SO overpowered that it's not even funny. Nerf Melee Hunters. Nerf them to the ground!!! (See? I told you it was QQ's from the forums. lol.)
Rogues have maintained their high, consistent DPS. Good for them.
Then on the other side of the fence... besides hunters that are getting the Nerf in 3.0.8, has there been anything exceptional or strong about any of the ranged classes/specs? Hmm.. maybe I should go pick up my dagger and start meleeing as well. So... welcome to Attack of the Melee, enjoy your ride.