Mine (at least the Millies) have been running out of the pen between my feet in the morning for green pick the little rotters. Not good when I am doing 6 pens before I head to work. They come back most times when I tell them - little flapper feet and all.
You are so right about how lovely they are. I got 3 eggs in 4 days and I am sure it is still only one pullet laying. I thought they didn't lay very well.
I find with biddie she will lay for a bit then stop then start up again with not long breaks in between.