We had a FP for them today around 12:30. We walked in and were the only people in the FP line. When we were sent to the room we only had about 5 families in front of us. It only took 5-10 minutes from entering the line to seeing Anna and Elsa. I was shocked and wouldn't be surprised if this is a abnormal experience. We've waited a lot longer in the FP line before for the other princesses.