I gotta query this as as my black rocks are still laying "all guns blazin" and they get let out around 0730 and shut up about 1630..ish. They are totally free ranging over about 2 acres but don't seem to understand the reduction in daylight. They are about 30 weeks old and were late layers so maybe they have a backlog!?
I know that chooks are born with the total amount of eggs they will lay (bit like 'oomans) & hybrids are better layers but this current run seems almost excessive (although we are managing to sell them at work!).
I think there is the current/perceived wisdom and then there is chicken wisdom which at times might just say "wotever, am I bovvered, I'm layingetoverit innit"...as it were to paraphrase modern chicken talk....ahem!