Okay, so just for my records;
April 13th is when they were first hived. The queen didn't escape her cage until 3 days later.(April 16th) I think she can start laying as soon as she escapes. Today, May 7th, marks exactly 21 days since the queen escaped her cage and presumably the first egg was laid.
It takes 21 days from laying an egg to the point where they chew themselves out of their comb and are 'born'. So, if my math is correct that means today a bunch of new babies should have been born. The queen can lay up to 2,000 eggs a day. Since there wasn't a lot of comb built when she escaped I'm betting she didn't lay nearly as much. I know at least one side of one end comb has quite a bit of almost-matured brood on it and I'm sure if I opened up the hive and took a look-see most of the others will have mostly mature brood as well. (Edit, last time I checked it looked as if some had 'hatched'. Also adult bees were noted being balls deep in the empty ones speckling the brood comb, presumably feeding newly laid eggs???)
I should expect higher aggression in the coming days since these new bees will see the nest as their only home. Of course this part is speculation so if they do increase in aggression it may not be due to that. I do know that as a colony increases in size it will become more aggressive. I also have read that the more honey stores and the more capped brood a colony has the more aggressive it can *potentially* be since they have more to lose/defend.
The colony's honey stores, brood, comb, and numbers are about to get boosted hard from the new births. I need to act now and get my new slats cut down to the right size in anticipation of that. There is but one bar on the end with foundation that has yet to be built on and the one after it is showing fresh comb being built. They will make queen cells and swarm if I don't stay on top of this and make sure their home doesn't become too crowded. I think it may be a good idea to cut and add another bar tonight and prepare the rest with foundation for the coming days.
On another note there is some indication of robbing such as dead/oddly acting bees on the ground in front of the hive. The dead ones could just be ones that died naturally and were tossed out of the hive. I'm not sure what could cause the disorientation of the others. They almost seem drunk.
Last thing I want to mention is that I planted some mint on the corner of the shed nearby. I hope it takes over the strip along the shed. From what I've read bees LOVE mint and it's flowers.