PS3 version of GTA 4 confirmed 720p, and 640p rumor came from a post

[Username2324]

titibgosse said:

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

Again, he used a screenshot, that he couldnt even confirm was the PS3 version. So no, he was not lying, he was just foolish for using a screenshot he himself did not take.