The differences between this and overspeed sprinting are huge. Overspeed exposes the body to higher than normally encountered forces and this is where the adaptation comes from. Overspeed jumps actually reduce the loading on the legs and are therefore not even comparable. The only people I could see this type of training working for is those who are speed-deficient or those who are not well practiced in generating voluntarily explosive efforts. For everyone else, depth jumps, bounds, and approach jumps will probably be more helpful.