Yes, I put in the wrong photo for the Angus, oops, been a long day. I pasted the wrong url into the little box, so I went back and corrected the mistake, thank you.
You are in error on the feedlot issue. The primary mission of the feedlot is there to make the cows heavier for market. That is why they are fed a diet of grain and silage for about 200 days. The removal of the grass fed taste is a by product of the feedlot, and is why Americans are not used to the grass fed taste because they have been doing that for so long.
A cow when ready for the feedlot is about 650 pounds or more. At the feedlot the cow can experience as much as a 60% weight gain.
The first completely American beef breed was/is the Santa Gertrudis.
No, the American Brahman was first. The Santa Gertrudis was recognized as a breed in 1940. The American Brahman as a breed was firmly established by the 1920's, but breeding began in the 19th Century.
In fact, the official history of the Santa Gertrudis given by King Ranch, who developed the breed, was that they started in 1918 by breeding Brahman bulls with Beef Shorthorn cows.
I do agree with you that the higher price of Angus beef is a product of marketing. Angus are about 60% of the American beef herd, and are the most common beef cattle in the USA.