i was in town for a georgetown interview and another guy and I decided to swing by the admissions office to see what was up.
we were both complete in nov. and had heard nothing since.
The woman asked for our amcas numbers and told both of us that we had been placed in the hold category and should have received the letters back in dec. However, neither of us had.
She said we were currently under review and would probably hear in the next couple of weeks.
So it seems possible that only difference between people who got the hold letter and those that didn't is a certain postal incompetency from the GWU admissions staff.