What ever is the brand, any "impossibilities" that happen should lower your confidence in the reasoning that deemed them "impossibilities" in the first place. I don't think IQ is so strongly protective against deception, for example, and I do not think that you can assess something based on how the postings look to you with sufficient reliability as to overcome Gaussian priors very far from the mean.

Further, in this case the whole purpose of the experiment was to demonstrate that an AI could "take over a gatekeeper's mind through a text channel" (something previously deemed "impossible"). As far as that goes it was, in my view, successful.