I cant wait for June 12 now. These people might be actually for once too busy to post all this crap.
I have seen those comparisons, and they do a lot of research and industry techniques to compare game performance and graphics.
Eurogamer is a sister site to Gamesindustry.biz (anyone and everyone who is in the games industry frequents this website), and attend every major gaming convention and have their own multiplatform gaming channel.