This was far from a win for anyone, including the FAA.
The FAA has been forced(for lack of a better way of saying it) into a "knee jerk" reaction to make sweeping changes to how model aircraft are being looked upon. By putting out a set of rules on the same day they were supposed to be enforced shows that the FAA is scrambling to meet the requirements Congress has set upon them. The AMA has not done anything that could say they received concessions in the rules since the FAA has not put anything in writing that says AMA members are not going to be held to a different standard than anyone else that wants to fly an R/C