Well, I think most of you know I have a pretty sweet deal with Creekstone Farms Premium Beef so I'm all about CAB. BUT my calves are also backgrounded: weaned generally 60 days, fully vaccinated, heifers guaranteed open, bunk broke, docile and a fairly uniform group (my goal is always 45 days but this year some later calves filled the 60 day calving window).
Yes, black (primarily Angus) sell better here. But a group of backgrounded Hereford or Red Angus will sell better than "black" off the trailer any day. Char, anything grey or white & dairy breeds will take a hit, regardless of backgrounding.
Edit: all calves born this year within 60 days was wrong, I had 3 calves after that.