That's reinforced by point #6 ("Ruby is too opiniated"). Ruby is not particularly opiniated and the community seemed to have much less attachment to doing things the idiomatic way than Python folks.
The whole "opinionated" thing is a bit silly really. Ruby isn't all that opinionated, as the GP poster says. Why Python people would get their bee in a bonnet over "opinionated" code is somewhat beyond me. After all, Python is a language where whitespace is significant...
'There should be one-- and preferably only one --obvious way to do it.' from http://www.python.org/dev/peps/pep-0020/ a sentiment that is re-enforced by the python community and even used to pitch python as an easier language since there is only one (right) way.
It is true the blog post does not mention Python. However, if you should pick one "opiniated" language in the same niche as Ruby, this is the one most people would pick.