Glen Mills the first coach to.....

I agree, But we expect things to evolve. Im sure other coaches have improved upon bud’s stuff. I know for a fact my college coach was one of those old school coaches who belived in running all althetes to death. Everyone was a 400m runner to him. I went to college running 10.6 and 22.0. I left running 10.8 and 21.34. lol. So Yea I would never do the volume bud suggests. I just like to see what other coaches did.
As for Jamaica, Tempo is the key to recovery in my opinion. With recovery comes fast times. I dont think the guy you spoke with knew how to explain it. But its just what charlie prescribed. speed days, tempo days. You cant run fast if your tired.