Just tried nitro cold brew straight up at Primo Passo on Montana in SaMo. Tastes like Stumptown’s little baby brother. Sour note is there when first hitting the tongue but just a subtle sour compared to its big bro. No sweetness, but relatively smooth.
On another note, Primo Passo does a pretty descent pourover. Usually two types of beans are offered. Today is Costa Rica and Columbia - both medium roast - don’t recall the estate/provenance. Columbia has some of that initial slight winey sourness like the nitro. Didn’t ask but wouldn’t be surprised if both the nitro and pourover were from the same beans.