Bashing might be a bit harsh. Looks like the author is expressing legitimate concern about the proliferation of Python 2 over 3 and, let's face it, there are a lot of differences while 3 "is the future" as it says.

The percentages may or may not be simply a case of C++ verbosity, but without actually browsing the source, we shouldn't jump the gun on exactly what percentage of "heavy lifting" C++ is doing vs. Python.