I can't tell. Is this genuine, or is it some kind of Poe's Law (https://en.wikipedia.org/wiki/Poe%27s_law) thing?

People say pretty silly things about TeX and LaTeX, but this is so obviously silly that I thought of it as being like an April Fool joke. On the other hand, the sprinkling in of admiration for DEK, for instance, doesn't mesh with that.