I will never be one of those women - tall, or imposing, or on average physically built anything like a male. While it would be interesting to use physical size as one way to measure and/or compare how people of different sexes or genders are treated, due to the fact that women are in general physically smaller and lighter than men, I do not think that such an experiment would demonstrate an accurate assessment of how women as a whole are treated. Are you saying that this behavior happens because women are in general physically smaller and therefore less imposing, and that the behavior would prove to be an equally common experience of both sexes if only men and women were the same size? similarly tall, similarly "imposing' men and women are corrected by outsiders
If this is a question of size than its not a question of gender. There are short men. However, I doubt it is the size of the person that matters, but it's a good thing to control for in a scientific experiment. Otherwise the title would have to be "people correct short people more than tall" rather than "people correct women more than men." It's just bad science not to control for height.
With that in mind one should attempt to control for weight too, right? You could divide subjects into weight classes. I bet no one would tell Andre the Giant to smile. But on the other hand, when he wasn't in a lot of pain I do hear he was a ton of fun.