As they say on another part of the internet, "pics or it didn't happen". For an example this short it would be so easy to show the code, and see how much the scala version could actually be improved.
That is one thing I don't like about the shoot out, even when you don't want it to be about performance it still is. When they measure code size they only measure the best performing app. They don't have a separate set of measurements for concise code. So most of the FP entries are C in an FP skin.
The programming languages shootout has clojure down as a bit larger than scala for the same benchmarks: http://shootout.alioth.debian.org/u32/which-language-is-best...