Those threads are fanboyism, pure and simple. They believe that any game on the 360 is inferior, and multiplats breed mediocrity, despite the fact that the best games this gen are multiplat, and Forza 3 compares to the top PS3 games in terms of graphics, as does Gears 2, to a lesser extent.
The whole argument revolves around BR, and it's the same argument PC fans made when consoles started getting multiplats.
Truth is, like PC fans, they're worried about the competition, and looking for a someone to blame their lackluster or equal multiplats on. The PS3 fanboy is of the absolute belief that the PS3's graphics are vastly superior to the Xbox 360s, and the only reason that doesn't show very often, is because developers are lazy, equal minded, and don't want to make the PS3 look too good.
Ironic, because most 360 games look better than most PS3 games. Only Killzone 2 has really backed up the superior graphics argument, and that game was vastly expensive and time consuming, and no undertaking of that magnitude created on a new engine has been attempted on the 360.
I don't need your console war.
It feeds the rich while it buries the poor.
You're power hungry, spinnin' stories, and bein' graphics whores.
I don't need your console war.
NO NO, NO NO NO.
