I probably have longer legs than that woman, but you wouldn't notice, because I don't dress like that! :-)
My knee is of course not in contact with the knee rest, as it is more in line with the gear lever. My leg is resting against the knee rest, thus supporting the knee, and allowing the gear lever to go into first gear without hitting my knee. If I don't spread my legs, my knees would interfere with the steering wheel.
(I drove a Lotus Elise where I got the knee jammed between the steering wheel and the gear lever in first gear. Had to select second gear to steer.)
