As a longtime Lisp observer, I can't say that I've ever seen Jon Harrop conduct himself as a "heavyweight" in forums unrelated to OCaml, Mathematica, or F#.
Ah, my mistake, I didn't notice the difference in name spelling. It was indeed John Harrop, not Jon Harrop, who appeared to vanish from Clojure after the licensing discussion. I should have made my point without reference to individuals.
"heavyweight" was my opinion of him based on his education, demonstrated ability, and publications, not anything to do with his way of representing himself. I found his comments very interesting, informed as they were by his extensive work in other languages.
