E-Brake would have not made hardly any difference. If it jumped forward 40 inches it may have only moved 36 with the E-Brake. The Camry was hit from underneath and thus most of the braking force would have been from the front wheels which were locked anyways.
2012 Nissan Altima 2.5s GT-R
2008 Range Rover Sport Supercharged
Previous BMWs (2008 135i, 2012 328i)