We discussed the specific study you are referring to earlier on DBR:
My opinion is the study (as described by ESPN - I haven't read the original) is quite poorly done overall, but that the one trend you cited is by far their most convincing point.
Also, I am all in favor of cracking down on defensive physicality. Far too often, college teams just look helpless on offense, unable to do anything but throw up a prayer. I appreciate good defense as much as the next man, but basketball needs good offense too, and right now I think the offense needs a boost.