The author of that post is a C programmer. This isn't just snark; it's dumb snark.
A C programmer posting that kind of nonsense is even more stupid than a non-C programmer doing it.
No, CPython is implemented in C. Python has been implemented in many languages, including C# (IronPython), Java (Jython) and in Python itself (PyPy). The latter, I might add, is maturing incredibly rapidly.