Whee! This thread got resurrected from the depths of time!
It caught my eye because I recently lost the last NHR I had in my flock. I loved that girl - she was my foster biddy and was just too cute. I thought I was going to lose her back in early January, but I brought her inside for a week and got her healthy again. She went back out into the coop and was doing just fine, even had started laying again, and then last week I went out to do chores and there she was - she had just dropped right off the roost in the night, poor old girl. It wasn't the dignified ending I would have liked for her.
Anyway, that's not what I got on to say - I agree that Hamps do lay wonderfully through the decreased light of winter. I didn't notice a terrible drop due to heat, but then it doesn't get too hot where I live.
Individual chickens can vary wildly within a breed. I've had Australorps who lay 365 days a year, and others who are just freeloaders. I've owned a Golden Comet, which I thought were nothing but egg machines, and she never earned her keep either. Then again, my sister had a Cornish x that lived two years and even laid an egg from time to time! You just never know...