I have to say I think you're either lying Dave or you've convinced yourself you're some kind of psychological genius.
This is not the first time that you have either directly accused me of lying or associated it with me. Certainly, I am not a genius. I hope you have a large bank balance.
As to the subject, I am an engineer and understand production manufacturing and it's limitations. However, a major factor in ski variants is usage, and how the two skis become damaged in different ways during their lifetime.
There are many ways in which ski damage occurs, the two main divisions, apart from initial variants, being incidents and constant usage by the same skier.
Incidents might include hitting or glancing off something, tree, rock banking, (or in my case, Admin) Because of preferred turn direction, most hits occur on the same side, and damage compounds.
Without realising it, most skiers do use a left and right, even if they neither plan to do so, nor even think about it. The reason why I identify l&r is that my right hand holds the skis with the right ski brake on top, then I pull upwards with my right hand, and drop that ski to the right. All right handed skiers do this most of the time, because their right arm is stronger. Left handed skiers do the opposite, but they do it constantly.
Now, almost everyone has a dominant turn, and this is only significantly reduced with experience. Your dominant turn, TonyH, is right.
The effect if this is that one ski is constantly under greater pressure than the other. Over time, torsional and longitudinal stiffness between l&r increasingly varies.
Then the question is, can you notice it? My view is that VERY inexperienced skiers will never notice the difference, they will have too many other issues to contend with. Then there will be intermediates, some who do think about things, and try to understand the hundreds of variations going on in ski technique.
Of course, some skiers do not care about technique. Fair enough.
When you consider the great advice from people such as Pavel, Trencher and CEM, on how much difference a small change in binding and boot set up can make, then why would you NOT consider how much difference a ski variant can make?
No I am not a genius, I just think things through. And I can assure you that I do not lie. By my reckoning, this is the third time that you have accused me, or associated me with lying.