Yes, it would be different/harder carrying gear. But I'm sure if an XInfantry-game's contest rules required carrying/using certain gear we would see some amazing sights. I think we would learn a few things about where the limits really are.

Sort of like snowboarders are now doing 20 foot jumps for recreation because of Shaun White.

These kids are pretty good. Basic training can only do so much. High level skills are developed in society, and mind-set about what is possible is largely set there too.