My first take away from this little exercise is that conciseness only goes so far. I have seen people post a one-liner solution on their blog in language X and conclude "X rocks". Except that their solution will take hours to complete.
A credible language must make it possible for developers to solve problems with either conciseness or performance in mind, and ideally, allow a whole spectrum between these two extremes.
So far, only Java, C/C++ and OCaml have shown to be up to the task. Can you add your own favorite language to the list?