It's true. I was sooo lazy this weekend that i didn't want to roast my last 1.5 lbs of green coffee beans separately (1/2lb each of Rwanda Butare Bourbon, Classic Italian Espresso Blend, and Puro Scuro Blend) ... so, well, i mixed them. I have no idea what it tastes like yet. I'll report back when i do.
UPDATE: Tastes good! Holds up well in milk drinks. I'm giving it a few days to de-gas and settle.