Sorry for the delay in responding. Was busy all weekend (not skiing), and have come down w/ a cold, so my head's not been in the game.
I had noticed from your previous posts that you are partial to the XXs. [img]graemlins/thumbsup.gif[/img] Based on what I've experienced so far during my brief ownership, I share your enthusiasm.
To your question. I did not notice any change in the edge-to-edge quickness of the XXs. As for liveliness, the effect of the piston "on" is not really noticeable at low speeds, or when you're not loading the skiis much. The effect becomes more pronounced when you are really mashing the ski. It's not so much that the piston dampens the energy of the ski. Remember, a piston just stores the energy, not dissipates it. So what happens is that the piston compresses as you load the ski, then releases it gradually as you unload/unweight the ski. I've been trying to think of a metaphor that conveys the "feeling". Imagine a trumpet & a tuba, both playing at the same volume. The trumpet would be with the piston "off", the tuba with it "on". Or maybe how a car accelerates shifting from 1st to 2nd gear ("off"), vs. how it accelerates shifting from 2nd to 3rd ("on"). Does that make sense? If not, I'll have to go back to the drawing board.