[rebelos]

This has been possible if not easy to accomplish for a very long time, so calling it "AI" seems like a bit of a stretch. I suspect most people can be fingerprinted according to a handful of less typical grammatical flourishes and reuse of certain uncommon words and turns of phrase. The only real challenge is scaling that up.

[acjohnson55]

Sure, but there's always room to advance the state of the art. And in the article, they mention using the adversarial AI approach, which I would say is firmly in the world of AI, and not just statistical analysis.