This is such an overused statement. Every video that I've seen between Bill and Tom, it's Tom giving Bill ideas. Sure, as a rookie, Tom needed to be developed. The strength & conditioning staff got him stronger. The OC got him prepared for the schemes, etc. Bill wasn't spending 1 on 1 w/ Tom while he worked his way up from 4th stringer to back-up QB. Tom had already been through all of that at Michigan. Nobody taught him his work ethic, commitment, drive, heart, leadership, etc. Tom was a natural, not on the athletic side, but on the intelligence and intangibles. Tom was a freak competitor and went out and got his own coaches and conditioning guys. He was relentless in his search for perfection.
Bill is not an offensive coach. Bill is not a QB whisperer. Bill didn't call offensive plays. Yes, the Patriots helped develop Tom when he first came into the league. Just like every NFL team develops players. It didn't take Bill to develop Tom. That's nonsense. Tom would've flourished with any other HC.