Disolitude is a very level headed xbox fan =P he brings up a point which I thought everyone knew. With xbox having a larger library I would think it would be harder to get the median score high. Ps3 is hard to develop for and I think even Kaz said they did it on purpose to avoid shovelware (which I admit was Sony spin) but it's true to some degree. Less games overall get made for Ps3 but less bad games in general since they can't risk it.
Especially now that MS lifted the 720P AA rule and games can be SD. 2010 will be the year of lowest overall quality for the 360 for sure.
CAn you imagine a 480p game on the 360 and the thrashing it will get form reviewers