We arrived at San Juan port about 11am, they opened the doors for embarkation at noon on the nose and we were settled in our cabins by 12:30pm, the only way to go. It made us feel like we had an extra day on the ship!
I was in Ft Lauderdale this weekend. Customs and debarkation are taking much longer now. Don't plan on boarding before 12:00. People started lining up at 11:00 and had to wait outside in the sun. The terminal used by Celebrity for the Summit is not as nice and large as the one used by the Century.