Interesting point cdif...it's the opposite for me. I'm about 5'10" and 205 (when fat). However, when I trim down about 15-20 pounds, I'm generally far stronger and quicker and do much better in the post against the same guys. My energy level and stamina are much better and I generally feel much stonger and physically much more aggressive.
But I'm talking when I'm losing extra fat that's just hanging around, not losing muscle mass...
If I lose even 10-15 pounds of muscle mass, it's a differetn story.
Maybe it's individual. For example, look how much better Perkins became by losing that extra weight and transforming that pudgy fat into lean muscle mass. I think Perkins is actually lighter now but far more effective. Maybe it wouldn't be the case with Baby but I'd sure like to see him try it, I'm sure he could always put that extra layer of Baby fat back on if he needed to...