Clojure: The JFDI language
I enjoyed the presentation very much, until    "Engineers 3-10x more productive"

Citation needed.If this were generally true (of any technology X) the dollars would be flowing that way in an unstoppable torrent, and anyone using anything else would be the subject of ridicule and/or pity.  It would be like writing custom websites in C.Since that isn't happening, I have to take assertions like that with a sizable chunk of salt.  The alternative would mean that there's a gigantic arbitrage opportunity that's being missed by a bunch of highly motivated people.  So yeah, citation(s) please.