I know it's a popular Hacker News trope, but when done well I actually appreciate comments of the style "the author does a comparison and has some results, but do also keep in mind xyz that is non-obvious". I know there is a problem with people who go through articles and try to pick things that could affect the results and treat that as invalidating them, but more often than not simple comparisons like these do have more to say about them than what is presented and I don't want to discourage those.