OK, Let's keep this really simple: look at every one of these photos and evaluate the outside knee relative to the inside knee. These guys all know how to ski. Yet there is a distinct similarity in their stance. Knees together and what we call an "A-Frame". There is also a common ski boot in this equation, it's a Fischer Boot!
Wow, Fisher boots again, Huge "A' frame. Manny!
Now let's look at the difference: "A" Frame here!
Notice the difference in leg angles compared to the above skiers, these guys are winning.
(Above) Knocked-kneeed or "A frame"
Much of this has to do with boot design and boot set up by manufacturer's boot reps.