rebound is simply the path of your CM moving abruptly upward at the end of the turn from not absorbing extra energy by flexing the legs. It happens with any ski because it is not about the ski it is about how you deal with the pressure. If you hang on to it the straight leg will act like a pole vault and send your CM towards the heavens instead of down the hill. If you soften the leg at the end of the turn there is no "rebound" and it does not matter what sort of ski you use.
Further proof is there is only so much potential energy in a bent ski. Take one bend it and then let it go. as it straightens out how much energy is there? 10, 15, even 20 lbs of potential energy? well that is simply not enough to lift my Fat a$$ off the snow especially at the end of the turn when I am pushing maximum density.
Sorry about this but lets stop this and talk about what is really going on shall we?