I like that response by House - especially the part .. " just one tool in the toolkit". I think one of the most important parts in that toolkit, are the physical endowments of the pitcher, as a use-and-reinforcement experience for feedback. Hand size, upper body attributes are definite pluses here in addition to the right age, level of maturity for good training and the coaching that goes hand-in-hand.
As for my experiences using a football, not much. On the other hand, it makes sense that a spiral is pretty good indicator that a football is being thrown the right way- hence, I assume everything leading up to and releasing the football for flight should ... I say should, be correct. I would also assume that the "feel" by the man throwing the football must "click" in the sense of..." Ah... got it", when all the timing, muscles, momentum and so on hits the right cord. But then again, these are assumptions on my part with respect to throwing a football.
As far as pitching a baseball ball that gains any benefit from throwing a football.....I say if it works, it works.