How Many Horses does your Posi eat?

hotrod magazine did an article about rear end strength a while back, and they said the 8 3/4" is stronger than the ford 9". they also said in another article that chevy ran clutches and internals that would keep enough power from the wheels so you didn't break your rear end, also springs that would twist length wise to have the same effect. doesn't bias have strange effect on the conscience?