Are you just digging into semantics, or are you wondering about offerings? Delta does not have a D1 service offering from ATL to LAX/SFO/SEA like they do according to mnbp's answer above. That said, as a CHS-based flyer I appreciate the occasional wide-body equipment flights on this route, even without D1 service. (Usually a 4am wake-up for me, so an upgrade means I get to sleep on the way to Monday morning meetings!)