[Year's_End]

Wouldn't the extra weight over the front axle help stopping distances somewhat? As weight shifts forwards, the front tires would have more weight over them which should benefit traction, is this right?

Or would it be the other way around. I could be wrong, and a rearward weight bias might be better, as a forward shift in weight would provide equal contact amongst all four wheels, like a mid or rear-engined car.

And one more thought, wouldn't the extra weight of an AWD system negatively impact braking regardless of how it handles the traction?

I'm just throwing out ideas.