RE: Braking effort/distribution
There are two factors here that can be confused.  First is the distribution
of braking force from the brake system of the vehicle.  The distribution of
braking force, front vs rear wheels, is controlled by the design of the
brake system in the vehicle.  No matter what you do, that remains the same
regardless of speed or how hard you push on the brake pedal (unless designed
to not have a linear response to pedal pressure).  The second factor is the
load distribution at the wheels during braking.  That does change depending
the dynamics of the situation and can result in all kinds of loads at the
wheel.  The part of this discussion that started this thread was talking
about the braking system itself, not the dynamic load distribution during
braking.