"First impression" now equals "Incorrect conclusion from careless partial reading?"
And people wonder why I so often complain about "poor reading comprehension" even on HN?
And if that careless partial reading comment is directed at me, which it is fair for me to assume so seeing as this conversation started from a retort to my comment, I didn't only read a piece of the post. Before I comment I read the entire post and sometimes (usually on forums) I break the post apart like you've done and respond to pieces at a time.
Anyways. I find it very amusing that you disregarded such high praise; however, it would have been odd not to do so seeing as the poster seemed to make the mistake you seem to dislike.
Although you are correct in saying that the comment was hostile and condescending. I'm sure the poster meant it to be as such for many possible reasons none of which I will try to guess.
I posit the "tone" comes from the reader.