It has been floating around for a while but I don' think we've seen anything as official from DL as what we've seen in the last week. Even if it's been going on for 6 months, DL still hasn't added a new seat map to their website supporting the configuration. There's only 1 75G flying but there's already an official seat map. In fact, DL has added a new CR7 seat map, but it's completely in contradiction to what they've released as the new configuration.