What helps other games over PS games to get 95, 96, 97 etc...is that much fewer reviewers review them, so if a non-PS game is acclaimed the law of averages is on it's side. You realize that every PS exclusive has over 100 reviews easily, whilst XBOX exclusives or even multiplats not so much. It seems every Xbox outlet, every biased xbox troll is eager to review PS games. They even purchase them to make sure a few troll reviews get in. I'm sure Stevivor is itching to 1up IGN Korea.
Even older Nintendo games and those games still sitting at the top of overall meta charts only got averaged out of 15-25 reviews...