It seems like a lot of people want to make GTA IV their whipping boy for some reason.
It's graphics were much better than in III, VC, and SA. And they were up their with Gears of War I, never seen such great hype for a game that was primarily grainy black and white, and Uncharted I which were supposed to be the games with the best graphics at its time of release.
So, yes, GTA IV deserved high marks for graphics.
I believe MAG scored higher than the last SOCOM, so not bad.