|As is typical of these kind of advancements in skiing, they were made from observations not from research or thought into biomechanics.
A little skepticism is healthy, Race510, but that's quite a statement to make. Can you back it up? I'm not saying you're wrong--I don't know the details either--but you certainly haven't convinced me that you're right. And I really don't believe that they just threw these things together recklesly without some educated thinking and research.
The concept is not new--it's had a few years to prove itself. Far more convincing to me is my own experience skiing Fischer's Somatec boots three seasons ago, and early prototypes the season before. (Yes, prototypes--they did research and test the concept for several years before releasing the boots to the public.) While those early boots were unrefined, the "Somatec" concept worked very well for me. Like many skiers, I'm an overpronator, and the boots dramatically improved my alignment and edging power and feel, and reduced my footbed posting and canting needs, as advertised. (This was my review after about a month in the new boots.)
Also convincing are World Cup results. Few people had heard of Nicole Hosp--another serious overpronator, I'm told--until she launched herself to the podium consistently with the help of Fischer's boots.
I don't pretend to be an expert in biomechanics, but I know enough to understand that the concept is based on established principles of foot and ankle function. The rotational effect on the knee that you describe actually serves to counter and reduce the problematic knee torque that results from excessive pronation. Steve described it well--when we over-pronators flex our knees, our feet collapse, causing the femurs to rotate and the knees to track inward. That
is a problem. When we rotate our feet just slightly outward--which is what the Nordica Aggressors and Fischer Somatecs do, it affects foot and ankle function such that the knees track straighter. The result, both in theory and in my experience, is predictably more positive and effortless edge control with reduced need for other corrective counter-measures (such as posting footbeds--which also causes the leg to rotate).
In short, they work! Most people (70% or more) are over-pronators, and for them, I am convinced that the "V" concept is simply a better design.
Because Nordica's long-proven Doberman was a much more refined boot than those early Fischers, I went back, a bit reluctantly, to a "normal" boot after a year in the Somatecs. Good footbeds and professional setup allowed the legendary Doberman to work very well for me, but I still longed for the real advantages that the "V" stance provided.
Enter the Nordica Aggressor, two years later, and color me happy!