To what degree in you estimation does weight affect a fight outcome at some of the lower/middle weight classes. We see smaller HW's often fight and handle larger opponents, and it leads me to wonder - how well would an elite LW or FW guy do against a solid but not spectacular MW or LHW assuming they didnt have a style nightmare to deal with.
Here are some examples of hypothetical fights that I would like to offer as discussion points:
Kid Y vs. Chris Leben
Shinya Aoki vs. Kalib Starnes
Gomi vs. Kazuo Misaki
Sherk vs. Brad Imes