A great driver would be good driving anything... but NASCAR is a show (not really a sport, is it??
) so far from F1...
From my point of view, the fitness, sensitivity, talent and intelligence required to drive a "whale", with a big, heavy, old-fashioned big-block V8, pre-historic suspension design, tubular chassis and basic aerodynamics in circles (most of the time...) are far, far lesser than those needed to succeed in F1...