Some evidence that there wasn't rampant cheating:

On a sophomore physics midterm, 60% of the students failed the test (including yours truly). The professor was rather angry about that in the next lecture. Said we needed to work harder.

(Grading on a curve was against institute policy.)

Another unusual oddity: there were no "honors" courses or "weeder" course tracks. No remedial classes, either. (Sadly, Harvard now offers remedial math for their incoming students. Given the intense competition for admission to Harvard, one wonders what their criteria is. The Prof Kingsley days must be long gone.)