[They were also complaining about] my own implied support for Bayesianism over frequentism.

I don't see that anywhere. It's clear the majority of LessWrong (the actual subject of Ilya's actual sentences) thinks Bayesian statistics (who was talking about epistemology?) is better -- with the possible exception of gwern, who uses whatever is most pragmatic (and who I personally think is the actual winner of this debate).

Ilya comes across as not being aware of how much Eliezer and other people here have written about that debate. In fact, it's not even clear to me if he understands what someone like Eliezer (or for that matter, an academic epistemologist) means when they say "Bayesianism."

Even a casual examination of their comment record (or, alternatively, a Google search) would have demonstrated that you're completely wrong in your assessment. I don't know any other regular on the site that knows more about statistics.