The guys were good players to begin with.
And in my experience, what good players do is listen to the instructor and throw out a lot of it and just keep the few things they feel are valid or apply directly to them. Unless an instructor hand-raised them from pups I'm don't think your point is valid. I've taken lessons from world champions and they do not get credit for my current level of play. What I got from those guys were interesting experiences, a few tidbits I still use to this day, and a couple of "a ha" moments that validate what they told me.
It's on the player: their base talents, work ethic, and how self aware and insightful they are of their own game.
Lou Figueroa
