I have not seen that it is. I generally book for 9 so with the exception of Narcoossee or CRT I have just booked at my 180 +10
I call for the above listed.
I woudl be online and ready at 6AM on your 180 so you can jump right in. Book the restaurants tha yo wnat the most first, and start with the most difficult slated for the back end of your trip. I also make sure my CC info is stored so I am not slowed down entering it.
At 7 Am, if you still need additional ADR's that you were not able to book online, call in. If you are struggling, look for two smaller tables. There is never a promise that larger parties will be seated together, so I figure it is always worth a try to book two tables and ask to be seated together.