Some of this may have to do with the general differences in attitude we often see between Ruby and Python developers.

In my experience, Python developers put much more emphasis on creating systems that are correct, secure, robust and reliable. Part of this involves thinking through any changes thoroughly, and being somewhat conservative in the adoption of new technologies and techniques.

The Ruby community, on the other hand, generally places much less emphasis on such factors. They're often much more willing to use newer software, even if it means the stability, correctness and security of the software systems they're building is decreased.

So it doesn't surprise me at all that Ruby developers would rush to a new version, while Python developers take a slower approach involving more thought and care.