That is the quickest way to add a mated queen to a few frames of bees. But I did 2 walk away splits with a frame of brood, queen cells that they had made getting ready to swarm, and a frame of honey and pollen. The nurse bees stay with the frames and tend the brood, the queens hatch, mate, and start laying. Same thing they would have done in a swarm, but only one queen would have lived and killed the rest. The original queen would have swarmed and left with a group of the bees. I prevented it,
I also make splits with a frame of eggs, frame of brood, and frame of honey and pollen. The new hive realizes it is queenless and turns a few eggs to queen cells and in about 4 weeks she is mated and laying. The swarm cells cut that time in half. A mated queen in a split will start laying as soon as she is released. Either way, it is a start to a new hive.