I do agree with the anti-snobbery part, but, again, as someone who totally skipped over the Haskell parts (which were mostly gibberish to me), I still think the article was quite enlightening.
Of course, it's also a matter of the audience you're picking, I wouldn't talk about optimization algorithms, convexity, and computational hardness to an audience of 10-year-olds first learning to program (even though it underlies everything they will do in any first programming class which can be done efficiently), but I also wouldn't discuss introductory programming topics and the definition of a Turing machine to an audience of theoretical computer scientists, even if that's what we end up talking about in a very abstracted sense.
Of course, it's also a matter of the audience you're picking, I wouldn't talk about optimization algorithms, convexity, and computational hardness to an audience of 10-year-olds first learning to program (even though it underlies everything they will do in any first programming class which can be done efficiently), but I also wouldn't discuss introductory programming topics and the definition of a Turing machine to an audience of theoretical computer scientists, even if that's what we end up talking about in a very abstracted sense.