I am genuinely surprised. The parent is the last of my recent comments that I would expect to be disapproved of but it managed to get to -2. And not out of any evident general assassination either from what I can tell. That usually means that either people disagree strongly or, more commonly, that it goes against people's politics. Since I am not aware of any group that would find that particularly objectionable the obvious hypotheses are either two people somehow disagree about the relative strengths of chimpanzees or the meaning of my words are less transparent than I thought.
Given their level of cleverness chimpanzees are more clever at dealing with other chimpanzees than they are generically clever at tasks other than interpersonal relations. Is that not both true and trivial? The corollary seems equally obvious. Given their level of cleverness and relative to other individuals of their species autistic individuals can be expected to be better at non interpersonal tasks than interpersonal tasks.
(I didn't downvote the grandparent.)
I disagreed with that because it appears the difference between chimps and humans is that humans are better at social things, including modeling other humans. Chimps can learn, but they don't teach- probably because they don't understand that their children can learn.
The claim you're making seems subtler- that if you divide a chimp's ability to model reality by a human's, you'll get a lower fraction than if you divide a chimp's ability to model chimps by a human's ability to model humans. I don't know enough about their ability to model reality, but the impression I get is that chimps are pretty clever.
In their 2011 chapter for the Cambridge Handbook of Intelligence, Stanovich et al. review the evidence suggesting that intelligence and rationality are not the same thing and that rationality is often more important than intelligence. They then lament the fact that there are no standard tests for measuring one's "Rationality Quotient." Then they take a few steps toward such a thing by suggesting some important rationality skills (actively open-minded thinking, fine-grained emotional regulation, tendency to seek information and fully process it, etc.) and rationality 'mindware' (probability theory, scientific process, economic thinking, etc.).
Here are those pages in particular: first a graphic of some important rationality skills and mindware, and then a table of the components of rational thought: rationality components, relevant literature citations, and example word problems that would test for each rationality component.