I agree with you "Just about there"
I had the same question in my mind. Obviously they are not going to do the same security check twice.
I see two reasons,
1. No security checks at the time of stamping for cases already checked at INS (Just dreaming, don\'t you love that?).
2. Excuse to cover up delays and change in priorities.
My theory, If INS is going to move at this pace, then at least the Priority dates will not retrogate soon, as there will be more visa numbers available due to slow approvals.