I'm going to go with Fedor, too. Here's why:
1. Mir's was impressive... he did what he does, take some punishment, then submit. Actually breaking the arm was a bonus. Props for having the wherewithal to pul out the slick sub while being beaten on... but still, he was getting beaten on.
2. Arlovski's... I think that Tim was gun-shy about subs. He even said so in the interview afterwards. Solid win, still.
3. Fedor... the dude just dominated Arlovski. Didn't even give him a chance. No "surviving damage" to get a sub, no gunshy Tim, he just came out and kicked Tim's trash, plain and simple. The kind of domination Tim would probably only expect from an ugly chick in leather boots with chains and whips.
Defecato, ergo sum.
Leading the Thiago Silva bandwagon