[Big-Foot]

The question you ask does not match the topic, but I see where you are going.

Myles hit the nail on the head.

Typically front calipers are mounted towards the rear for a couple of reasons.
1) Most cars these days are called "Front Steer" cars - this is where the steering arm is - on the front of the spindle/knuckle assembly - There is more room for the caliper at the rear.
2) Placeing the caliper at the rear also allows the opening of the caliper to face forward where it can take a little more advantage of cooling air - although most backing plates will manage the air regardless.

Rear calipers - When you see right side calipers mounted in the 2 O'Clock position and the Left side calipers mounted in the 10 O'Clock position, it's usually because the manufacturer is getting away with one caliper casting to service both sides of the car - thereby putting the bleeder valve at the top of the chamber.

If you want to really get into the science (almost black art) of chassis forces in braking, take a look at Dirt Late Model braking technology (Stock Cars). I have worked on many of these that use a floating brake caliper bracket on the differential that has another link that joins to the chassis from the caliper. This will take the rotational force you have noted and impart it directly to the chassis via a link. They are a booger to get set up right..