I can say that all of the Clojure code I've personally seen for "real world" systems in Clojure tend to have a very small average method size, but I can't speculate on proprietary code I haven't seen. Certainly most open source Clojure code is very well written.

And if Light Table is only an IDE for "better programmers" then I don't think that's necessarily a bad goal to have. That said, since Light Table is supporting Javascript as well, it's not exactly only catering for minority languages.