No matter what you say, there'll always be a defensive fanboy trying to reassure his purchase by attacking topics on this board.
Jedi454 please make rebuttals against all the posted comments, would love to see that, oh you just gonna 'hit and run'? Yes you are very good at that, keep at it.
Except you DO notice the difference.
Play a game like Borderlands, Halo, or any other recent game and THEN play Metal Gear Rising (which is set to 60fps) and tell me you don't notice a difference. Yes, the texture quality in MGR is lower compared to most games, but this was done so the FPS could be higher.