When we were there in June, all the early breakfast people were let in at the same (about 7:50) time regardless of reservation time. Also everyone was let into BOG without regard to actual reservation time. That was a little frustrating for me bc we had an 8:05 ADR and thought we would be ahead of all the rest of the early breakfast people. Of course, with an 8:30 ADR, that would work to your favor.