mine is a little longer but they’re both not great, decent or average i’d say
it is a display of posterior chain rate of force development/explosiveness…there is no run up so the stretch reflex is eliminated for the most part although there is and eccentric contraction prior to take off
it’s best used as an assessment tool for the above and I’d put it in the higher level variations of activation exercises, the eccentric stress when you land is quite high
it can also be used in a training sense, and ct has prescribed it, during complex training programs, also for the above