@JAS might be hard to gauge as these were my first 8 sets of the season. Rather than putting a percentage on it, I would rather explain it in words.
I think the "feeling" of less work can be directly correlated to the ski moving through the turn, while continuing to create angle, with less tip pressure, and less tendency to stall at the finish. This translates to more consistent speed through the apex of the turn, earlier acceleration off the ball, and angle into the 1st wake. So, instead of having to "horse" the ski to get going out of the ball, it already is, you just need to be ready to go.