alt Hacker NewsDifferent people read at different speeds, it took me about 5 seconds when skimming it. If you engage in enough discussion related to Russia online you will quickly learn to identify when inauthentic commenters suddenly show up from a previously idle account to add their 2 cents.
The person in question doesn't exhibit much of it, but one will also learn when skimming to identify certain grammar and sentence structure characteristics that can point to what is the first language of a person, even if they're writing in fluent English.
All that expertise (which requires some proper experience in the topic) even before you plug a llm to it, even few years ago they were good enough to identify unique writing styles of people across different accounts on HN.
Anonymity is gone from internet for some time.