From sources... There's not much overlap between the Scala and Clojure folk, so nothing to do with any "growing pains". Scala's seeing much more uptake than Clojure.
Yeah, I can't imagine someone who's proficient with Scala seeing anything special in Clojure. I'm just a sight-seer in those languages, but I can see there are some neat things in both.
Parenthesis are always offputting to me, even though I like a fair amount of clojure concepts. I often feel like functional programming has made a cottage industry around putting obfuscated names around relatively simple ideas (see transducers for example)
