Couple of things I thought I add....
I think the suggested technique is good for an easy (NASTAR type) GS set. If you are on shaped skis all you have to do is tuck at the first gate and you can make nice carved turns all the way to the bottom just by swinging your butt back and forth.... errr, I mean "turning your hips in the direction you are going"
. However it would hardly work on a steeper and tighter set when you have to work hard to make a turn. I'd say the tighter the turn you are making the more you lead with your inside hip, the further you pull your outside ski back, the more weight you have on your outside ski. Pulling your outside ski back puts more pressure on the tip of the ski, making an arc tighter.
I can only take your word on what is the becoming a norm in the ski instruction nowadays, but the explanation to what you are describing is in the G-force difference and skier background. When you teach a recreational skier how to use the new equipment correctly, you need to break the "throw-them-sideways-and-skid" habbit. One way to accomplish it is make sure the ski is not pushed around. Hence weigh them equally, all work is in the hips, do not move your feet back and forth so there is no chance of steering, etc.
On FIS type course you do have to put alot of pressure on the ski to make the turn. The ski does get pushed. The difference is that there is no margin for error when you do that pushing. Little bit forward or little bit back from the sweeet spot and the ski goes into skid. You can no longer do equal pressure on both skis, first, because twice the weight on one ski makes it bend more and thus carve tighter. Second, because on a watered down course twice the weight means better grip. Third, because at the middle of a turn the body angulation is such that outside knee is almost fully extended and the inside knee is almost fully bent; as a result your bent leg is much weaker and can not put the same pressure as the straight outside one. Once again here is the link to the picture that dispells the myth of "always equal pressure" http://www.fis-ski.com/mediaworld/image.sps?id=2003601
Also when you are in the middle of a World Cup turn your inside foot has to go forward the length of the boot, because due to the high angulation there no space between the outside leg and the snow. However here lies a very common mistake. You do not want to think about driving your inside foot forward. If you do just that, it will actually extend your inside knee and push your inside hip back. The goal is to drive inside knee forward while keeping the inside foot back (a boot length ahead of outside foot), thus putting pressure on the front of the boot (your shin got to feel it). That will bring your hips in the right position.
.... did I just make things even more complicated .....
PS: Pierre, I saw your post only after I submitted mine. Sorry if I repeated you in some way.
------------------Speed does not kill, the difference in it does...
[This message has been edited by VK (edited March 30, 2001).]</FONT>