Re: Queen laying patern
While they were almost certainly not laid on the same day, if that was the case, then yes, they would all emerge at almost the same time, probably down to the hour. The reason behind this is that insect development rate is most determined by temperature. Since bees can keep the brood nest at nearly the exact same temperature plus or minus less than a single degree F, the developmental process is almost exactly the same for every bee in the colony.
USDA Hardiness Zone 7A, Hobbyist, First Hives in 2017