Yes Romo discussed thus last night, calling it the Mahommes effect. And before that it was the Brady effect. Teams facing them felt more pressure to be perfect, teams with them relax more and believe no matter what, the QB will pull it out for them. That's just a Huge advantage. The Bills with Allen have it to some extent, but until he proves he can get over the hump and get to and win the SB it simply won't be the same.