Well, the newest Invisible Walls (GameTrailer's vidcast/podcast thing) talked about their Uncharted 2 Review (which was Shane Satterfield's review). They also has the guy who wrote the Demon's Souls review come on to "defend" his review too... (Shane: "When I got back from vacation, I saw the review and said "Hmmm...that's pretty high.") :lol
Anyways, long story short, according to Shane, GT will always score and skew games scores higher for games that are "original and offer value" more than anything else. According to him, 9.3 is the highest score a game like UC2, "which does absolutely nothing new or original and plays it as safe as possible", will ever receive.
Of course, there's absolutely nothing on the site that states how GT reviews their games and what they value over what so how were people supposed to know? :lol
So, he addressed it anyway, but without really addressing it. We'll see how this holds up with more sequels hit this year.