Pinches Arria for her good post. I have no real opinion on this other than to say; I think only a person thats experienced the female version of "sub space" really knows what it is for her.
I speak from some experience as a former "resitance" training instructor for the military, on the subject of torture and phycological manipulation. There are many paralells to D/s and what we in the trade call comparmenting of a prisoner during torture and interogation, or phycological conditioning.
Despite some simularities, the phycological compartmenting described by Virulent is quiet different as I understand it, from "sub space".