I like how this article was itself clearly written with the help of an LLM. (You can particularly tell from the "Conclusions" section. The formatting, where each list item starts with a few-word bolded summary, is already a strong hint, but the real issue is the repetitiveness of the list items. For bonus points there's a "not X, but Y", as well as a dash, albeit not an em dash.)
Not only that, it even looks like the fabrication example is generated by AI, as the entire question seem too "fabricated". Also gemini web app queries the tool and returns correct answer, so don't know which gemini the author is talking about.