Agree with the "man".
The trick is to be honest with self and keep a diary of all the skis you have and all positions used.
Have you ever heard of the double blind research approach ? It is used in all research designs and has application
In short the skier does NOT know where the ski bindings position is since it is done by another person.
Try them. Note parameters. Performance.
Very soon skier will note differences as the bindings are changed position.
It is personal and it is variable to ski type !