Right on! I was going to make the same comment until I saw yours. Charles Nutter has been very enthusiastic about invokedynamic based speed improvements - can't wait.

A little off topic: as a consultant it seems like the demand for Clojure was been tremendous: Clojure is a nice language and very performant. It will be really interesting to see how much large speed improvements in JRuby will cut into Java's, Clojure's and Scala's developer market-share.