Dear Chuck,
I don't see any horror stories here, and I have surprisingly often found that those who are most enthusiastic about the ZS don't understand much sensitometry either. I don't see any of what any of us has said as negativism. Those who have warned him that the ZS is not for everyone are saying exactly the same as you, in the above post: if it works for you, great.
My own reason for posting what I did was that when I first approached the ZS, and could not quite see the point, I thought that this was some fault in myself. When I came back to it years later, I knew a lot more and could see WHY it wasn't for me, even though it might suit others.
What I'm saying, in other words, is that he should by all means approach it as you suggest with optimism and curiosity, but that he should not waste any further time if, after giving it a fair try, he finds it doesn't suit him. He certainly shouldn't feel guilty or stupid, or imagine that it will make him any less of a photographer -- all of which I foolishly did, as a result of listening to too much preaching from committed Zonies.
Cheers,
R.