All this back forth over what IGN meant is laughable. Usually in a review on IGN or any site, when they say the competition they mean across all platforms. Otherwise there is a qualifier such as "the best graphics on 360" or "the best graphics on PS3" There was no qualifier so that implies they mean period. The most recent example of this is the No More Heroes 2 review. When the reviewer says
"Graphics 9.0
Some of the best visuals on the system, complete with a great overall style. Some graphical errors occur, but the unique design shines through."
You are entitled to disagree. I'll wait until I actually play the game myself to judge. I have KZ2 so I can compare it and ME2 directly. Reviewers and posters heaped massive praise on MGS4's graphics and I know I disagreed. I thought Uncharted was leagues better. To each his own.