That begs the question though, and the author makes note of it. The Packers are a hugely successful front running offense. They are much less successful when behind (esp. behind late).
I think this has as much to do with McCarthy as Rodgers. McCarthy purposefully does not vary his game plan mid game so he can avoid making emotional decisions based on one off occurrences or swings of emotion. But this works less well when you have a game where the offense isn't automatic and a small number of drives left to score.