“This comment is AI” is the new “First Post” from /. days. Please stop unless you have evidence or a good explanation.
(and I suspect that plenty of people will remain credulous anyway, AI slop is going to be rough to deal with for the foreseeable future).
That may or may not be what's happening with this account, but it's worth flagging accounts that generate a lot of questionable comments. If you look at that account's post history there's a lot of familiar LLM patterns and repeated post fragments.