I'm commenting because I also have gotten all my birds from Townline Hatchery in MI (by buying individual chicks at a local farm supply store that is stocked by Townline).
So, over the past two years I've gotten these breeds: New Hampshire Red, Araucana, Silver-Laced Wyandotte, and ISA Brown. None of those birds has ever gone broody in two years. But, I only have one bird of each breed so that's a pretty small sample.
Here's the thing that I don't understand about people complaining about broody birds. I have another bird (unknown breed--from a local farmer) who goes broody all the time. She has successfully raised one clutch and would have raised several more if I'd let her. All I have to do, though, is remove the eggs. When I remove the eggs she lays more.
Yes, she's grumpy and growly when I remove the eggs each day but being broody never stops her from laying more eggs. In fact, I think her broodiness leads her to lay more eggs because she wants that clutch so bad. She's a phenomenal layer--has laid almost every single day for two years.
So, maybe it's just my hen but I don't see how broodiness stops a hen from laying. (So long as you remove the eggs every day.) Are there really broody birds out there sitting on empty nests and refusing to lay more eggs to fill their empty nests?