It's more than just overall, at least to me. It's that Madden(and so called "Czar", which is great when FBGrating is a thing with scouts rating players) overrates all the stats. I'm waiting to see how Peyton's Throw Power is because his arm isn't what it used to be, and Madden probably won't really mess with it.
For the overall thing, Madden 13's last update had like 150 or so players that were 90+ (FBGratings has only seven elite players now, which is realistic), that's nearly three teams of all 90+ players, which is just dumb. 90+ should be for only elite players and there aren't 150+ that are elite. Matt Ryan(despite how much I like him) isn't an elite QB like Rodgers or Brady. Any stat that is 90+ should mean the player is elite at that particular thing (pass block/throw power/man coverage/etc.) but Donny Moore just throws ratings off of just stats(like Aldon Smith having a huge spike in ratings because of his giant sack totals, but only being an elite pass rusher doesn't make you great. It didn't help that when Justin Smith went down, Aldon performed worse.) It needs to be a combo of stats/scout research/numbers from combine and what not, not just stats.