Yes! I enjoyed it on a TATL out of ATL on April 6. This is the business class champagne that was a winner--IIRC, the only winner for DL--in the international FC and Biz wine competition reported in IIRC Business Traveler magazine, the issue that first appeared about a month ago. I had a great purser who admitted that she had been ashamed to serve some of the non-champagne junk in the past; she clearly understood that all sparking wine is not champagne and was pleased that I appreciated it. (It was a good flight....)

Today (April 11), TATL EU-ATL also served Piper Heidsieck Brut (nonvintage), red and gold label. Pre-departure, the same prosecco that I've seen at least since summer was served. However, in both directions a red bordeaux was served which was not on the wine list in the printed menu.