I don't know if we will get much in the way of higher discounts. I'm going in January and I was surprised at the slim pickings as far as resorts and room types under the GP deal. Typically, they don't increase availablility when the AP and resident discounts come out, so I'm thinking there could be some blackout dates that maybe the GP deal didn't have. I decided to go ahead and book the GP deal and if a better AP deal comes out, I'll switch it. Even though I have an AP, I would say probably 75% of my bookings are using discounts other than AP (either GP, or bounce back). I just go with whatever will save me the most money.
As far as when that's hard to say. They waited a couple weeks after the Visa discounts to release the AP, so maybe they will come on board in a couple weeks.