Well, what I understood from the article is that they were originally a much more slender fowl--still by all means a meat bird but much more agile and dual purpose than the modern Cornish. Notice what the author said about the Cornish being an "able flier" that roosts in trees when on free range. That sounds nothing like the modern type Cornish. Also, the author made a good point about artificial insemination and egg-laying ability. I personally do not think that any breed should be bound to existence merely by artificial insemination: it makes them harder to keep and honestly it makes them much more liken to the Cornish rock. As far as egg-laying, I have not heard of Cornish being reasonable layers, and I think that is because this trait has been bred out of them since the 1900s.What I get from that article is that they were developed from Aseel or Asil and now look nothing like them. So while they don't look like Asil any longer, they do look like the Cornish that I've seen pictures of from the early 1900's.
Do you have photos of the 1900s birds you were talking about? I haven't seen pics from that period but I saw an old illustration of Cornish bantams and believe me they look nothing like the modern Cornish bantam.
Thanks for your thoughts, though. Hope to hear from others soon!
~Gresh~