I would agree with this. We generally are early lunch eaters, generally 11-11:30 or so, and I know we've had no problems getting into CHH at that time.
It is our "must-do" every trip, love the anchors aweigh tuna sandwich!
I know it was 11:00 a few years ago in May. I can still remember standing at the register in front of the CM, watching the clock and waiting for it to turn to 11:00. I don't know if it's different at different times of year.
I'm pretty sure we ate at 10:30-10:45 in December. We were the first in the restaurant and it turns out their computers weren't working so it never actually used our CS credits!