I've heard of that index before, and I'm skeptical of it. Ruby and Python waning? Not among any of the shops or programmers I know.

Maybe if they qualified it: "Ruby and Python are declining in use for corporate enterprise applications on the Internet." Something like that; I'd believe it. IBM's website is probably not in Django; it's probably Java with Struts or something.

The the DevOps movement alone, almost entirely based in Ruby and Python, is really expanding, and the call for programmers is increasing. Waning? Hah.