PRS on Subarus

I just read this yesterday on in the Toronto Subaru Club Forum that almost all Subarus have passive rear wheel steering. They first introduced it with the SVX (i think). Anyways its pretty cool how it works. When a heavy load is put on the rear wheels while turning the wheel turns toe in and when weight is lifted off a back wheel it turns toe out. For example if you were making a hard left turn the back right wheel will turn toe in and the left rear wheel will turn toe out and vice versa. I thought that it was a cool feature. Correct me if i'm wrong.