No, any jumper I've seen leads with the heel, just like in a one-leg jump. Basically, ankle dorsiflexion before jumping. If you would plant in plantar flexion, it will take too long and also the Achilles would not be already stretched out.
It would be plantar flexion -> dorsiflexion -> ankle overload (possible ankle collapse) -> plantar flexion
Whereas in a proper plant its' dorsiflexion -> plantar flexion jump