So at that clinic, they were saying it doesn't matter where the ball is or was, only where the runner touches OB? Never heard of that one.
I don't think that is what DH meant to imply, but gauging by test questions, etc., I have seen him author, that's probably what he said. He tends to use generic or colloquial terms regarding rule discussions. When called to task, I can easily see him saying, "Well, yeah, of course I meant where the ball was when he actually touched the ground out of bounds. I thought everybody understood that."
But, for me, that supports what I have been saying, i.e., the ball's position n-s (even if over "foul ground") when the ball becomes dead is the forward progress spot. But, like I said, RR's new ARs really confuse me. I could be completetley wrong, at least now, if not for the past 38 years.
But that touches on another related subject. RR's recent treatise on rule study made good points for personal, individual rule study. Thinking and writing rule-related things in your own words, for your own consumption, is certainly a good and valuable practice, as long as you understand the rules correctly. But, in my experience, when discussing rules among your peers, you must use "rule-speak" jargon. You must. To use terms like, "crackback" block, "lateral," "line of scrimmage" (in lieu of neutral zone), etc., just leads to confusion, which creates misunderstandings.
That's my opinion, for what its worth.