I disagree. It's the matter of familiarity. Clojure is extremely productive and the best PL I have tried (out of many) to quickly build prototypes.

Whenever I have a requirement to solve a problem in a different language (e.g. interview challenge, etc.) I would still do it first in Clojure and then convert it to whatever language is required. Yes, I have to do the same work twice, but even then - I am still faster doing it that way.