Definitely! And I'm still convinced there's a seasonal influence as well. All of the birds I'm culling during these colder months have much more fat on them than my summer culls.
I hate it so much, because mine got so fat they started sleeping in the nest boxes and my roosts are really low, I wonder if they will lay less now they got this big.
For now they are laying good. Every other day I get 5 eggs from 6 hens. In days between I get from 1 to 4 in any order. Very pleased with that.