Don’t call it’s Bill’s theory. It was discussed inUSA Todaye I believe. Not sure, but some top source. It is a simple calculation of numbers that 45-50% of all footballers scholarship go to high school play tin The States from Tx to FL. About the same number of draft choices came from players there. It discussed that schools inside that corridor had the opportunity to get the best of those players. That schools outside those 7 states had a hard time getting the best players from the area.
You can compile it yourself but it takes just time and but is not hard. It came about because of the out pour of Black players into the recruits after about 2000. I wish I could find it but can’t but it did exist and it predicted teams like TN would have more difficulty in getting championship players because of it. It has proven true. Look at the record. If you appraise it honestly you would have to agree, but I don’t expect that from you.
The portal and NIL has affected the demographics a little. The big money is getting some of the better players attention. It will take a few years to figure it out.