That last qualifier is important. The girls I caned at school almost certainly had less experience of corporal punishment than the boys I normally caned. Their school did use corporal punishment but rarely, whereas at my school in that era, most boys of that age would have had at least a couple of canings under their belt, and some substantially more. Those girls reacted in a similar way to the way I would have expected a boy of the same age who had never been caned before to react.
If I’d caned more girls, I would assume that basic pattern would have held. Perhaps there would have been a somewhat higher percentage of girls who ‘overreacted’ but as it was five or ten percent of boys, even if it had been double that for girls, it still would have been a significant minority.
Girls in mid to late adolescence may not be as physically strong as boys at the same stage, but I don’t think they are significantly less physically tough.