Yes I know that I raise OEGB's If you cross a SDW over a BBR you will get a GDW and the Males do SOMETIMES look different. If you do it the other way around you get laughed at by the Judges.
My argument is sex-links are for producing a one time cross for egg production and or meat. Sex linked chick are easy to sex and works 100% of the time. NO guessing. You can sex from across the room.
Call what you are doing sexlinking if you want. It's not according to industry standards.