Braking hard from 80 mph in traffic is different from braking hard from 20mph in a parking lot, just as what the MSF class teaches is different from what keeps you alive on the road.
Think about it people.
Do you want to be in fifth or sixth gear at a standstill with fast and oblivious traffic coming up your ass?? Do you want to think about throttle control and finger - toe coordination while you are trying your hardest to stop?
There is a lot to this question.