That's what makes me think it's legit: the root of this whole issue was that OpenAI told GPT-4o:

  Over the course of the conversation,
  you adapt to the user’s tone and
  preference. Try to match the user’s vibe,
  tone, and generally how they
  are speaking.

https://simonwillison.net/2025/Apr/29/chatgpt-sycophancy-pro...

The response is 1,000% written by 4o. Very clear tells, and in line with many other samples from the past few days.

If you look at the full thing, the market analysis it does basically says this isn't the best idea.

FWIW grok also breathlessly opines the sheer genius and creativity of shit on a stick