I have hatchery BR's not BO's but I can tell you, my BR's are not even CLOSE to true BR feathering and look more like Dominique's. Out of the 15,only my cockerel has anything close to barring. The pullets feathering looks more "spotted" than barred.
I used to raise Heritage BR's and bred to the SOP, so have wondered what breed the hatchery crossed these birds I currently have with, as they in NO WAY, look true to breed.
It's my guess that the hatcheries are crossing breeds to get better egg laying, better meat, or other qualities they think the buyers want. I don't think any of the hatchery chickens are really what they are advertised as. JMHO
Next spring I am getting some heritage BR's and Dom's. If I remember by then, I will put up pictures of the difference between the chickens bred for the SOP and the hatchery ones.