Here's another opinion, from Vic Elfords
'Porsche High Performance Driving Handbook':
"In the last chapter we saw how important smoothness is in accelerating. If anything, smoothness is even more important when it comes to braking at the limit......."
Then later,
"Although I have emphasized the importance of smoothness, here is one time when you need an abrupt little stab or jab. When your foot goes to the brake pedal the first moment should be just that - a little jab at about 4 on the scale above.
That little jab will take up the pressure in the braking system and cause an instant weight transfer toward the front wheels. As soon as that's done you can start squeezing on the pedal in earnest."