Old: CHANGE THE LEAD SKI BEFORE EACH TURN
STU: The "old school" taught us to lead with the uphill shoulder, hand, hip, knee and foot. If we didn't, our skis would cross. Skiing with our feet close together caused some to shuffle one foot ahead at the top of the turn (1). There was also a tendency to tuck the outside knee behind the inside and get "stuck" there-something I avoid here (2). Lead change was most apparent at the end of the turn (3) . Many saw that as "good" parallel skiing, even though it was only a byproduct of a passive inside foot.
New: CHANGE THE LEAD SKI NATURALLY
MIKE: Because modern skiers use both skis more in any given turn (A), it is important to stay balanced over both feet. Allow your lead change to happen naturally as your hips tilt to match the slope (B). Natural forces thrust more pressure to the outside, but keep the inside leg working beneath you. This enables you to work your legs together. Hence, your skis work together (C).