I agree, the brake bias may be unbalanced a bit.
To be honest I am not sure.
However, during my racy road conditions, I am happy with its performance, stable n progressive feel. Normally I wouldnt jam my brakes just like that...especially round the corners.
Furthermore, my car is quite planted on the roads...maybe thats why as well.
However, on a general view...since I have used the supra 4 pot for > 4 years. I think its fine and great for point to point & last minute braking.