I agree with ClemsonDave.  It depends.   I coach a lot of novice skiers.  I explain to them that slalom skiing is about balance.  If you explode off the ball and cross the wakes with intense speed, then you have to balance that with a earlier, more abrupt, and further/deeper edge change. I've seen really good skiers who don't understand this balance. When they have an issue at a buoy and have to stay on edge long to the next one, they don't know what to do.  That longer lean has to be balanced with a much more abrupt and fuller edge change to a deeper inside edge.   When I watch West Coast, I am amazed at how much angle they generate and maintain across the first wake. This translates into earlier path and more acceleration.  They've accomplished all the angle and acceleration needed in a shorter amount of time across the wake.  Thus, they can edge change earlier, and more smoothly.   When I watch old school, I see them take a more conservative angle across the boat's path and then hold it longer.  They have to do this to get to the same point prior to the next turn.   Thus, their edge change is later.   The timing/amount of effort is different, thus for each style to achieve balance, the timing and abruptness of the edge change is different for each.   Still, each style is in balance with itself.