I wonder if there are varying definitions of "object-oriented"-ness.
Also, I hear clojure is a true scotsman while scala is not.
(CLOS is the Common Lisp Object System. If Smalltalk is more OO than C++, and I think most people see it that way, then CLOS is ... sideways OO than Smalltalk. It's not quite on the same spectrum, but it is still OO.)