SEC vs Big Ten Numbers are Fishy Here
I, too, wonder where your numbers come from, as another reader has commented. You write, "Of course the devil is in the details. And, the results are only as good as the data that is fed into the calculator." As far as I can tell, the data are simply the results of the games played between Big Ten schools and SEC schools. That shouldn't be too tricky or devilish.
You also write, "And what if the school once had a very small program that did not resemble its current program? Would you count the wins and losses from back to when it might have only been a club sport? Or, only from when it became a major college football competitor." Are we to interpret this as meaning you want to throw out any games between Big Ten schools and SEC schools before the SEC school rose to prominence? That sounds pretty fishy and self-serving. Maybe if an SEC team lost to a Big Ten team at some point, then that loss should be counted in the total?
In any case, it appears the Big Ten still has the edge, 94-87-7. Check out the very nice stats website, http://www.cfbdatawarehouse.com/data/div_ia/bigten/vs_conf.php