I would say no. FP return times are not all on the hours. They come every 5 minutes, like 10:05-11:05, 10:10-11:10, etc.
It is impossible to predict when people will return with FPs, or if they will return at all. And that makes it that much more difficult to post accurate wait times for rides with FPs, which is now almost all of them.
IMHO, the biggest thing to avoid is planning on entering a standby line shortly after the end of a nearby show or parade. Like going to BTMRR right after the FOF parade ends or going to the Safari right after a FOTLK show lets out.