Interesting analysis, but that might only have a ponctual value.
IMO, it's a matter of demographic/price ratio.
MS targeted its library according to its price (which was high, even if not the higher). they knew they will attrac gamers at first, and what genre gamers may like.
Sony diden't and that was a mistake. R&C is one example and sadly (cause i'm excited by it), I fear Littlebigplanet might proove another if it's released too early.
But later on, once prices of X360 and PS3 have dropped, the potential players won't just be core gamers, and they will need more variety to be seduced.







