I've had mixed successes, even at 180+. For October I was able to get BOG for 4 at 5:45 (the time I'd hoped) at 186 days for myself. For a client staying the same week I called 180 days from check-in at 6:00 am and tried every single night of their vacation, starting at the furthest point out. For their party of 6 there was absolutely nothing.
Now I'm waiting and obsessively checking for a client on their honeymoon in December. I will pass out from excitement if I can get it for them! Subbed to the cancellations thread and checking multiple times a day.