On April 4th, I discovered that my bees had made quite a few queen and swarm cells and they were capped. On the 6th, I moved one frame with 3 capped cells into a nuc. I checked yesterday (9th) and they are still capped. According to the queen rearing calendar, it takes 7 or 8 days for the queens to emerge, right? So if that's the case, then I first saw them right after they were capped, I hope.
On a related note, since it was my first time to make a nuc, I didn't shake any bees into the nuc. I just put the frames and the bees on the frames in the nuc. I think there may be enough, but if I go back to the original hive and get some more bees, would they freak?