We were unable to get anything for September when I booked at 6am 180+ days out (nothing for our entire trip for dinner), but I have seen two dinner reservation openings this week for our July trip. One, of course, will make us miss Wishes (9:15), but hey, I was thrilled to get it. Felt like I had just won a prize.
I booked all of our July reservations less than 90 days out and eventually got everything we wanted. Not so with September. I think FD makes some ADRs near impossible.