I might have missed the point of the post, but if you are starting a NEW HIVE than you will want some brood besides just having empty cells and workers. Brood will filling the gap beteen the queen hatching and the forst generation to hatch which she lays after mating.
You can't speed up the first generation of workers from eggs layed by a newly mated queen - and I never minded having competition queen cells in a new hive, just in case the queen has a poor pheromone or is killed during the mating process or other accidents. But a good queen will create an enviroment where workers will take care of "Other queens or queen cells" and you will have a good queen PLUS lots of younger bees ABLE to do in-hive duties as the first generation from the new queen emerges.