This isn't a scientific measurement or anything but- Manning was mostly stymied by the Pats until Ty Law was cut. Since then he's 4-1 v. the Pats, or close to that anyway. As for Brady? His only win v. the Broncos until last season came the year before Champ Bailey showed up, since then a shut out until 2011. There are so many factors that go into winning and losing - yes. But to have such a clear correlation between the two best QB's of this generation and how they fared against a dominant CB on a good team, well, it's interesting if nothing else.