I run some very simple Clojure [1] on an RPi 2 as part of a home monitoring system.
Startup is considerably longer than on other platforms (30 sec or so), but I haven't had any issues with runtime performance, and having a Lisp running on what is essentially an embedded platform is very useful.
(It'd be easy to make the argument that my agent code doesn't do much, but it doesn't diminish the fact that Clojure is able to usefully work on an RPi. :-))