To those with pullets not laying well, have faith. My girls laid sporadically with very small "pullet" eggs. But they are now laying very well. I've had at least two large to medium brown eggs daily despite the cold. They started laying well after 21 weeks, but they are making up for it. They are also great at foraging within their run for goodies, and they are not eating as much feed as I thought they would, given their size.
I wish my favorite pullet wasn't a hatchery bird so I could show her. She is picture perfect, started laying well in advance of the other two, and consistently lays the larger eggs. I plan on hatching out eggs from her this spring.