Hrmm, I didn't get that from that paragraph. He didn't say anything about "aspects" of personality, he specifically referred to "people" with "wills of their own".

Though I disagree with his generalization that ALL people work in this gestalt formation, I do believe there's more than one type of multiple system out there, just like there are various type of unitary personalities. Or are you suggesting perhaps there is only one true form of multiplicity? If so, what is it?