Most markets in N. California that I've been to don't call anything Delmonico's. However, where I work we have them. They are boneless rib steaks from the small end. Large end boneless rib steaks are called "market steaks" at my store. Prior to my current store, we never used separate names for either end. They were all just called "rib eye steaks" which I wish we did because almost every day, someone asks for rib eyes. Then I have to explain about the Delmonico's and Markets. Then I have to add that the rib steaks are the same thing but with a bone. Too much talking.

BTW, another market about 30 miles from my store sells Delmonico's, but their Delmonico is what my store calls New York which is boneless loin steaks or "strip steaks".

Maybe Delmonico sounds nicer than rib eye and the name change alone is worth another $1.00 per pound? The so called "high end" markets need to justify their price somehow.