I had heard of Delta simply because it's so big in Portugal. I can see the hype here! This reminds me a lot of Starbucks dark espresso roast, a really well executed dark roast that is balanced and level enough to go smooth with milk.
I'd describe it as dark but smooth, dark chocolate, long pleasant linger. Some dried plum. Maybe a touch of that European fiber cookies sweetness. Bitter and darkness are present but in moderation. When cool you get some blackberry notes. A top-notch cafe roast.
Cupping Method:At a cafe in Madrid as a double espresso