No, I don't think OP's comment is useless. It's not just a blanket statement, "Wow, LLM's quick", but also critically reflective, like a brief limitations section. This opens the discussion, by indirectly posing questions like, "Is it really this fast or "cheating"? How could we measure this experimentally? Etc.
It's useless because this is not novel at this point, its literally everyone posting on HN - I did a thing with an LLM but idk if its good! That doesn't open up the discussion, it retreads the exact same discussion that both sides are not listening to each other on.