I commend your effort, but 0-1 only leads to lower success when you add in Brady's lost season. If you remove 2008 (which you should, given such an important variable), then it grades out a a 4 in your system.
I know you were just playing around but, fwiw, your exercise shows that records can have a varying relationship to playoff success, not that there is a positive correlation. To the contrary, your results indicate either no correlation or, if we restrict the data to only Brady years, a negative correlation.
Not to take a silly exercise too seriously (too late!), but I'm not fond of basing everything on playoff success, either. The sample is already stretched perilously thin.... and then it hinges upon a set with even worse sample size issues.
Your serve.