Chrisn - the points about if calibrated correctly would make a pro driver faster is correct. If calibrated for less and less input from the computer
Driver's aid is for the 95% of the people out there and its not for the 5% who can drive from 8/10 to 10/10th of their cars. Racers push their cars to the edge and they don't want the electronic devices to kick in at moments they are wanting that push. They like less intrusive systems as the GT2, BMW M Modes(CSL), Ferrari Race, etc.
I would still like to know why Nissan drives the Ring with VDC disabled?