You might ask, "Why PFF?" The answer is simple. EAs top Madden ratings person is Donny Moore and he has tweeted several times about how much he trusts the analysis of PFF. On December 11th, 2011 Donny tweeted, "Have I ever mentioned to you guys who I trust THE most in the world of NFL player and team analysis...
Some other tweets from Donny Moore that indicate the use of PFF when it comes to Madden 12 ratings: