With people who have no obvious physical disability or severe cognitive deficits, there is very much an expectation of them to "straighten up and fly right", so to speak.
So an individual of average let alone above average intelligence, YES, will be expected to act like a "normal" person,
because people constantly make presumptions about others, those presumptions often being erroneous, and, moreover, once they get into the habit of doing so, will continue to do so.
_________________
"Such is the Frailty
of the human Heart, that very few Men, who have no Property, have any Judgment of their own.
They talk and vote as they are directed by Some Man of Property, who has attached their Minds
to his Interest."