A little, but I still get the impression that solid gold franchises still get solid scores. So far I've seen a lot of perfect scores for Gears 3 for example. It might well deserve them, can't say yet, but while I'm happy to see more mid level titles get reviewed more sensibly I think a lot of core franchises still see sites afraid to be too harsh (or to obviously go the other way).
Anyway, I would be very surprised to see Gears 3 below 90% because everything I've seen suggests its as solid and polished as the previous two with just the right balance of more of the same with enough new tweaks.
Try to be reasonable... its easier than you think...