These videos could clear up a lot of misconceptions about the "Cornish Cross". I sure learned a lot watching them.
Broiler Chicken Videos
All breeds were developed from crossing other breeds or by selective breeding. The "Cornish Cross" is not a hybrid but is as much a breed as any other breed. I was mistaken about that for a long time. I'm pretty sure the original breeds used to develop the current "Cornish Cross" breed included a Cornish, hence the name. The Australorp was developed from primarily the Orpington, but it is not an Orpington. It is a breed by itself, same as the Cornish Cross.
The meat birds you get from the hatcheries are as natural as any other chicken. Hybrid has nothing to do with organic. Organic has to do with gene splicing, how the feeds they eat are produced, and what chemicals are in things around them. Someone with better knowledge about the requirements may correct me, and I welcome that if they truly know instead of just guessing, but I believe a chick can be certified organic if it is fed nothing but certified organic food and kept in certified organic conditions from a day after it is hatched. This allows chicks from hatcheries to be certified organic. For some things to be certified organic, like vegetables, I believe the seeds have to come from certified organic plants, but I don't think whether the parent chickens are organic or not matters with chicks. By organic surroundings, I mean things like they cannot be housed in a building made with treated wood. Certain vaccinations are allowed, but some are not.
The Cornish Cross will grow big enough to butcher in a couple of months, while a dual purpose bird will take a lot longer. The meat from those young Cornish Cross birds is a lot more tender than the meat from the others because it is so young, a lot like veal is a different color, toughness, and flavor than meat from an older beef. Which you think is better purely depends on your personal preferences. So get young chicks, either hatch them yourself or get them from a hatchery or another source, raise them the way you want, and enjoy.