The difference between the instructor/coach & the young athletes, is absolutely incredible. The biggest thing that stands out to me,
other than being 1000x better at the drills, is his ability to perform them with a "straighter leg", similar to how you would force stiff legs during single or double leg pogo hops. This gives him much more bounce, much lighter/softer looking feet, etc.
http://www.youtube.com/watch?v=aR2MyqYs1pA