Why so much interest in what the pros use?

[federermcenroeagassi]

well i like finding out just to establish patterns between what pro's use and then trying to figure out WHY that is.

for example, lots of pro's use smaller grip sizes than a person their height and size normally would (mostly 1/4 and 3/8 ), and maybe that's because they can hold it all the way around and brush up on the ball better to create better topspin.