A while back I remember seeing a thread where someone mentioned the idea of pulling back the inside ski. While I thought I understood the concept at the time, I think it didn't really sink in until a few days ago when I was doing some shuffle drills. It was one of those Eureka moments.
All of a sudden I made the connection between pulling that inside foot back and moving to the next turn. By bringing that foot back, it dramatically shortens the distance you would need to move your CoM forward (down the hill) as you move into the next turn where the old inside ski being pulled back becomes the new outside ski. So I gained a whole new understanding of shuffle turns, and how they emphasize balance.
Then I came across this video. It was Josh Foster, and he was talking about how turning your legs will create lead change rather than a deliberate shuffle. I understand what he is saying here, and it makes sense, but when I watch him make a few turns, I think I'm seeing the lead change happen just before he reaches the fall line, which is where I would expect to feel the sensation of pulling that foot back. In other words, it looks like he is in fact shuffling to establish lead change.
Here is a shot where, to me, it looks like he has already pulled back the old inside ski, which at this point is the new outside ski and started the new turn. He hasn't quite reached the fall line, but the new inside ski is already starting to lead. Since he is before the fall line, there shouldn't be any rotational separation in the direction that would cause the lead change. If anything, there is still a small amount of separation in the opposite direction during the top of the turn.
This shot was captured at 1:06 in the video below.
So is he saying one thing and doing another, or am I missing something?