Yeah. A store bought broiler is processed at 6-8 weeks, a dp/heritage breed will be all skin and bones at that age. You're never gonna get the same softness. A 20 week old cockerel/pullet CAN be fried but will be a lil chewy in my experience. Once they get much older than that, you gotta cook em low and slow and most DP aren't laying at 20 weeks. Pullets will stay softer a little longer but not a lot.