Watch this video and then tell me that Toyota doesn’t have some serious design issues with their brakes...
http://abcnews.go.com/video/playerIndex?id=8980024
This is not the problem with the Prius, however.
In the video, when he hits the brakes the car slows down sharply, even with the gas on the floor, but he lets off the brake for his “don't pump” part.
I've tried this experiment myself from about 60 mph. My car (actually, it's a minivan with drum brakes in the rear) slowed down quickly. After slowing sharply I went on my way. I plan to repeat my experiment and stop all the way plus test the “don't pump” theory as well.
—regards