If they do like their moms did they may set up an assembly line, that would be so cool for you to see. Another thing they may do that their moms did was to accept any chick to raise, they would even steal them from other hens! The Malay rooster that I had with them would make them give the chicks back though.
The way I would check to see if the eggs had hatched yet was to get close to them, if they fluffed and growled none were hatched yet. If they bit me they had chicks under them!
When they do hatch chicks just be sure to watch Jaxon when he is around them. I know he will want to be right in the middle of them and the hens may take offense to that.
Monty with you not being used to the incubator 60% is not a bad hatch. Hatching is an art you know. What works for me won't work for you and all that stuff. It takes time to tweak your methods that work best for you. My last batch was close to 95% and I ran about 30% humidity for the 18 day run and then raised it to 45% for hatching.
And yes if they look like they will show I will put them in as bantam Leghorns but I forget what class they show in.Ive got some bantam NNs out of those too. Mom came from Oregon and was the only one to hatch out of 12 eggs. If these look to be SQ they will go in as the NNs in the AOSB class, I think.