As far as I see there are some discrepancies between the reactions of universities. The feeling I got is that, if you have very strong background and one of the best students that applied program then, in order not to loose such a student they have a tendency to accept your spouse as well. But if there are other students with the same background who are single, then they might reject you. I really want to be honest and do not want to conceal anything, yet being accepted together is the goal here.