Not sure what insiders these are but from people who are in the know have told me, critics who are reviewing the game (On MC) are head over heels over the game and calling it genre defining. I've heard nothing but 9s and 10s. People will be very surprised if they're expecting this to be anything less than 90, which seems like almost everyone here.
But I just don't understand that mentality in the first place... It's Hideo Kojima. He's never made a bad game. His "lowest" rated game has an 89. That, and Sony holding the embargo a week before release should really tell you everything. Same happened with God of War, which ended with a 94, and that was the last game they put a week in advance. Days Gone, Concrete Genie, etc didn't get that treatment, they were a day in advance.