TripleS wrote:OTOH we could very well ignore all that and concentrate on more important matters than how steering wheels are held and manipulated.
Agreed. Concentration, Observation, Anticipation, Planning and Execution (as an output) are more important than the physical car control.
Still, more often than not there is some benefit to be achieved by improving the driver's physical interaction with the controls, including pedals, shifter, seating position and etcetra.
The main improvement comes from achieving the desired steering angle while swapping hand grips as little as possible and using the least effort.
As with many other developments through coaching, the performance might intially worsen since the driver relearns good habits, but over time - an improvement is noted.
Of course the improvment is most notable on high performance driving (not just tarmac tracks requiring little steering), but it's also there in road driving.
PS. Another necessary part of such a demonstration would be to understand the language. And I do not not pretend to understand Romanian (in the video) any better than the next guy. Still, it's the best example of predictive steering I find on record.
Oh, and for a rally car, I think it goes through worst than a bit of dry steering.