I looked at the past 10 game reviews for the PC, the 360, & the PS3 to find the average trending score for reviews for games. Results:
PC Reviews:
8 Spore 7 Murder in the Abbey 4 Shattered Suns 5 Dracula 3: Path of the Dragon 5 Space Siege 4.5 Legend: Hand of God 8.5 Sam & Max: Season 2 5.5 International Cricket Captain 2008 7.5 1701 AD Gold Edition 3.0 Beijing 2008 --- 5.8
Xbox 360:
5.5 Warhammer: Battlemarch 5.5 Smash Court Tennis 3 5.0 Merc 2: world in flames 6.5 Infinite Undiscovery 7 NFL Head Coach 09 8.5 Viva Pinata: Trouble in Paradise 8 Unreal Tournament 3 8 Tiger Woods PGA Tour 8.5 Tales of Vesperia 3.5 Hellboy Science of Evil --- 66 -- 6.6
PS3:
3.5 Vampire Rain: Altered Species 5 Merc 2: World in Flames 7 NFL Head Coach 09 6.5 Ferrari Challenge 5 Monster madness: grave digger 8 Tiger woods pga tour 09 7.5 Disgaea 3: absence of justice 8 madden nfl 09 3.5 Hellboy Science of Evil 8.5 Soul Caliber 4 --- 62.5 Average review for PS 3 games: 6.25
So the Average review scores are: 1. Xbox 360: 6.6 2. PS3: 6.25 3. PC: 5.8
So basically, on the whole, using this sequential sample of review scores, we can see that Gamespot still favors the 360 over the quality of games versus two other platforms.
It might tell us that basically the 360 games are just better than the other platforms or that GS has a bias towards the 360. I think the 360 games are probably just overall better than the games available for these other platforms.