While I side with his statement, I neither like the condescending tone of his phrasing. But i believe he means advanced, 'esoteric', fancy smarty pants stuff like functional languages. One can spend aeons frivolously debating why pragmatism is (not) better than pure expressive power. And which language is what and then devolve to what is definable. mere mortals have better things to do with their finite lives.

Anyways... I can attest to F# being a breeze to get on WP7 and Scala can be wedged into android with some effort. Thats about it I think of in terms of no extra runtime required solutions.