i,d say its a bit of both, a drivers ability & a car built to make the most of that ability (tweeked to each driver ) two drivers in same team have usually very different set ups, wouldn.t get the best out of their team mates car if they swapped their cars.
as for Moto GP, i,m usually on edge of sofa leaning & sticking knee out ( sad aren,t i ),
Mark , have you ever saved a highside & landed back in the seat? argghh ! landing on the tank with wedding tackle making first contact
andy