It does not differ at all. Culture is what makes an ethnic group. The only thing that is different are 'tools' of their time and geographic location. Also, I think you mean "modern people" and "prehistoric people"?
There are four interrelated elements of aircraft performance: lift, weight, thrust, and drag. While the number of people, per se, wouldn't affect the performance of an aircraft, the weight of those people would. --- Also, the position of those people would matter in terms of aircraft performance.
It is important to mark a debut performance or appearance because it is normally related to the overall reception of the entertainer. A good debut performance will keep people looking out for a consecutive performance.