"The Xbox 360 is best for: gamers who take online gameplay seriously" So PS3 owners don't take online gaming seriously? Are you serious? Live offers one feature that PSN doesn't offer (yet) and that is cross game chat. Most of PS exclusives are on a dedicated server which provides a much more solid and smooth experience than can be possible on a P2P system, which is what Live uses for nearly everything. I fail to understand how Live is for serious gamers but all other networks are for people who are not serious about online gaming.
Your bias ruins all of your statements, even the ones that are correct.