quaz51 is a french guy (well known on one of the biggest french videogame where i go but he's also on beyond3D and maybe others website) which has a technique to know what is the native resolution of a game before internal upscaling (because all game are 720 or 1080p after !! ) and the AA applied.
he's the man who has obliged bungie to say halo3 is a 640p game.
moreover, he's a PS3 fan !
I really doubt he's lying