We are staying at the BWI concierge in December and then moving to the BWV and the CMs did make all of our ADRs for us, they insisted and I was grateful because it was a really busy time when our window opened. We have always had great success getting the ressies we wanted through the concierge staff, we have had CRT every trip, Candlelight Processional Packages (table of 8 at Le Cellier this trip) People have always made me nervous on the boards that the CMs would not be successful, but to date they have never let us down. We have never stayed at the GF, though, just the Poly and BWI.
As a side note, they had all our reservations made, with confirmation numbers, weeks before our dining window opened, not sure how they did it, but they did.