As I said, i think they have been teaching long enough to have a pretty good basis for the claim that racket's syntax can be a problem.

I am firmly in the "after a while you don't see the parentheses" camp, but I have a friend who I respect a lot who works in clojure (with Emacs/cider/paredit) that just doesn't like it.

I mean, I prefer sexprs above all other syntaxes, and I have had people tell me I just need to get used to indentation syntax or whatever they fancy.