Update! Merry Christmas to all! The Buttercup has now laid 3 eggs in 4 days! So much for everything I've read about this breed being a rather poor layer or, at best, a mediocre one. At least for me so far. LOL!
I guess also here in the coastal valleys of Northern California, it's not so much how many hours of daylight there is to activate the hens' laying hormones, but how much actual sunshine they get on any given winter's day. Which here we may have short days, but we have quite a lot of sun during those shortened days unlike many parts of the US.
Cheers!