Not sure i buy that, what I have always understood bigger calipers grab harder so long as you supply more fluid, i:e bigger master.
Now, with that bigger caliper on the same size rotor you can increase heat, brake fade and rotor warping, so I agree its not good practice and a compromised...
cost irrelevent?
thats easy, get 20"rims and run some wilwood carbon rotors with 6 pot calipers. you'll stop so fast you'll forget about the 30k you you spent doing it:hillbilly: