Funnily enough Ruby is doing not too bad - according to contributions [1] it's at stable speed since 2008 (!) without any slowdown. Similarly Rails [2] looks like healthy, steady project.
Ruby/Rails, for rapid prototyping [3] with minimal friction [4] it's still, after years, considered by many, as the best tool for the job.
[3] rapid prototypes land as production systems - that's a pro tip.
[4] minimal friction on all levels that you, as a programer care - from reading and writing code, scaffolding, dev/staging/production deployment, database migrations, testing to caching etc. - not many setups give you all of this.
I agree with you, Common Lisp does seem better and ABCL does well with Java interop (as does Clojure).
While the community around Clojure is fantastically good, I don't like the language itself as much. Personally for my hacking pleasure, Haskell, Common Lisp, Chez Scheme (or other Schemes), and Ruby are all more fun for me to use.
True, Common Lisp is better in every way, but still Clojure has its uses (in my opinion, mainly when you need to interact with a lot of Java libraries and don't want to submit to the sadism of the Java language.)
Also, the more Clojure users out there, the more people are potentially able to "jump" to the other Lisps like Racket, Arc, Scheme, and CL.
Also Common Lisp is better in every way ;) There's even a JVM implementation (ABCL) for people who like that sort of stuff.