alt Hacker NewsClojure is just better than CL in pretty much every respect. Excellent and well designed standard library, great concurrency primitives, core.async, built-in transducers (CL has SERIES which does a kind-of similar thing, but isn't as well designed and integrated) and the dominant immutability all let me write more maintainable code. Also, I can re-use model code on the client side (ClojureScript), so there is lots of code sharing, and I don't have to serialize to a crippled format (JSON), my data can pass from server to client and back intact (with sets, keywords, and other rich data types).
I used to love CL and wrote quite a bit of code in it, but since Clojure came along I can't really see any reason to go back.
I did not try Clojure so I cannot comment on how well implemented the features you quote are, when compared to CL. All I can say is that CL also provides much of the same functionality with its standard, cl-async, lparallel, parenscript, while (im)mutability is a matter of preference (IMO correct decision by CL) rather than dominance. The way I see it, is that CL is superior (opinion) due to reader macros and native compilation, rather than bytecode JVM.