I'm an early-riser, so I practiced with the 7 am calls prior to booking the PSB for the day we needed a PS at a given time. During that week, there were a couple of times when the breakfast was booked up like CRT -- in ten minutes, it was gone. Surprisingly, one day of that same week, it was wide open and the other day, there were some openings.
It's hard to know what to make of the differences. Sometimes, it goes quickly, apparently, and other times not quickly at all. Who can guess if that is/was a pattern or just a fluke thing.
This was for the week of 4/24 - 5/1.
KIS