Kano, thanks for the onhand info. I think you stated the case very well. And, as always, Sonoran Silkies has a lot of good knowledge about genetics and breeds.
From what I have read, and I am not in the same ballpark as Sonoran as far as knowledge or experience, a chicken has to meet the recognized color standards of the Ameraucana to be recognized as an Ameraucana. Otherwise, it is considered an EE. Does this mean that a chicken with Wyandote parents that does not meet the color standards of a recognized Wyandotte color is not a Wyandote, but is considered a mutt? I think the answer is that an EE is not a "recognized" breed so there are no standards other than a possibility that it might lay a colored egg where the Ameraucana, Wyandotte, or any other recognized bred, has recognized characteristics other than egg color to help define it.
And just to stir things up, how far from the standards can a bird be and still be considered an Ameraucana? With other breeds, I understand the best breeders have to cull most of their chicks even from their best birds to keep trying to maintain or achieve the standards of perfection. I'm not talking about the difference between breeder's birds and hatchery stock, I'm talking about the good breeders stock. The breeders have to work hard to achieve and maintain standards, whether Ameraucana or other breeds. It is not easy.
Now, talking about the hatcheries, does this mean that a Buff Orp from a hatchery is not a Buff Orp because it does not meet the standards, let alone one with a non-recognized color being an Orpington?
I don't think the difference in nomenclature will ever be settled, especially as hatcheries and others are calling EE's by the names Araucana or Ameraucana. To the breeders it makes a big difference. While information and knowledge is good, to the rest of us, I don't think it really makes a huge difference.
Please note, this is purely my opinion and I could be wrong about some definitions. My wife can confirm I can occasionally be wrong.