It wasn't deriding. It was suggesting that "inhuman" suggested something far more severe than he was actually talking about. At least one of the traits was withing normal human range (and probably two, given supertasters are a thing), and the other two were things that were specialized cases you could go through a whole campaign without noticing.
There are absolutely nonhumans written to be downright inhuman, though most of them are in SF rather than fantasy, so what the term suggested and what he meant seemed to have some serious dissonance, and it leads to things like my reaction of "I don't think most people can do that" and then him noting he does it regularly, because what he's talking about is, honestly, minor color issues and leaning in on things a subset of humans do.
Basically, I'm going to react to what people say; if that's not what they mean then I honestly have to suggest they use a term a little less loaded and a little more specific than "inhuman".