Well, I have no such intention as I genuinely believe 360 dev tool superiority is more than familiarity.
I was reading 360 being lead platform for Fallout 3, before that Carmack, before that all the other games, before that Carmack, ...
All of those mentioning better tools with no specific information naturally only stimulated my curiosity.
For example, we know PIX was a great asset, but is it still big advantage with GCMreplay out?