We call it 'threashold braking' and few master it with stock brakes because it not only generates a lot of heat but the modulation of stock parts is marginal at best.
I agree, cars are capable of better braking in this enviroment when supplied with the proper parts to do so. You can 'jam on' the brakes on a race car and lock up the stickiest of tires. That only proves that under extreme pressures the torque generated by the brakes can exceed that provided by the tire.
But when a proper techinque is combined with the proper parts the torque of the tire can be fooled as I call it, and the mass of the car can be absorbed by the brakes while keeping the tire at its maximum adhesion.
And the queistion of pads, it's about Cf. Thus more heat too.
