Club House Chemistry overated?

I just read a really good article from Bill Simmons on ESPN talking about A-Rod and his effect on the Yankees, and more generally, the effect a super star like A-Rod can have on a clubhouse. Something interesting to think about when we talk about the Mariner's improved clubhouse atmosphere (Or maybe percieved improvement at this point).

http://sports.espn.go.com/espnmag/story?id=4050462