The things he said about the Clojure community are in contradiction with the data from the 2012 State of Clojure survey here: http://cemerick.com/2012/08/06/results-of-the-2012-state-of-... .
Steve claims that Clojure folks come from the Haskell/ML world when the survey lists the "former primary language" of survey takers to be 1% Haskell, 0% SML, 0% Ocaml. Whereas they actually come from Java, Python and Ruby mostly.
The Clojure "replacement" in the survey is all over the map with Common Lisp, Erlang, Haskell, Java, Python, Ruby, Scala and Scheme all performing well. The liberal/conservative thing is a false dichotomy and Clojure community is probably living proof of that.