I can't imagine someone with an IQ of 90 able to come up with what EY wrote. Even the lack of spelling or grammar errors would be unusual for such a person.

Pjeby was referring to a specific, fairly simple sentence. The most complex part was the single comma. The sentence is rather less impressive than even moderately endowed cleavage displays.

I agree that the overall profile is a strong signal. If I recall correctly I described it in a cousin comment as an approximately optimal combination of signalling and screening given Eliezer's strengths and weaknesses. Someone else attempting to convey the same message would require non-trivial amounts of intelligence and an awful lot of familiarity with Eliezer's culture.