They are. They no longer have waits of hours. You can find FP after 60 days, often even at 30 days.
We went during EMH in December, just as the Christmas crowds were peaking and they had no wait at all but Cinderella and Rapunzel had a 15 min wait.
Olaf will be hugely popular at WDW. But his popularity has also dropped at DCA. We went in June and while they made you pull a FP for him they were for just a short while in the future. There was little wait for him. I think they have even dropped the FP for him since our trip. I realize DCA is different demographic but it just shows that all the Frozen things have peaked.