Look anyone can use a camera, it doesn't mean you know what you are seeing.
Some people see leg extension and early pressure creation and pivoting, wherever they look. I hate to have people mis-interpret great skiing and denigrate it with personal bias, misuse and misunderstanding of the basic tenants of physics.
Here in this montage is a perfect PMTS application of skiing at the highest level. In this montage, I can, as can many other educated skiers, describe exactly what this skier is making happen.
in contrast: The uneducated coach, flounders around, trying to explain their bias and by justifying their impoverished skiing, with the likes of pivoting, leg extension, pressuring and hip rotation, non of which are demonstrated by this skier.
Frame 1. Perfect balance, counteracting and counter balancing, and pole tap.
Frame 2. Flexing to release, this is not deep retraction, as you often see in WC slalom.
Frame 3. From 2 to 3 there is tipping off the edges when the lower body and skis are light, upper body is following tipping of lower body. Leading the tipping is the free foot creating a classic PMTS "O" frame.
Frame 4. This is an important moment and change in the body relationships. The new inside ski is pulled back, the outside leg maintains snow contact, (not pressure) the outside foot is held back and as a result reentering of the hip, or CG is already occurring. Since there is no outward ski tail movement and the tail of the ski is following the tip of the ski, pure carving with ski tipping occurs.