Or they fall to over excitement just as anyone else can! Especially when they rush a game and don't give a game time to digest and for flaws to be made evident, or play a lot of truly bad games to know that, say, FFVIII really isn't an atrocity. At any rate I think FFXIII kind of disproves that, the average is in the 80 range and some places were VERY scathing. Not that there aren't reviewers that, while not outright bribed, may be influenced in one way or another to give a positive review, even simple peer pressure or not wanting to hurt the feelings of a friend or acquittance (which sounds like Famitsu's problem).
I think a lot of it has to do with over excitement, but I can't help but feel there's some bribery that goes on. Remember that reviewer for gamespot, Jeff Gerstmann, who was abruptly fired after giving Kane and Lynch a bad score? At the time, gamespot had Kane and Lynch plastered all over the site with advertisements and there was a ton of hype for the game, then he gives it a bad score and what a coincidence he's fired just like that.
I'll have to agree to disagree with you about FF8. To me it deserves to join the ranks of Drakkhen, Orphen: Scion of Sorcery and Unlimited Saga. Even if it isn't an atrocity, it surely isn't a grade-A game like most gaming magazines were giving it back when it was first released. In FF8s case I think it was hyped so high due to FF7's success.
EDIT: Just wanted to add, I haven't played any of FF13 but I have seen my roommate play a bit of it. From what I'm told it's basically running around a pretty hallway 90% of the time and has a similar fighting system to that of FF12 (which I didn't like at all). I probably won't pick it up from what I've been hearing.