I was just reading up on the most economical way to brew coffee. Unfortunately, it only focused on whole beans vs. ground coffee, and left the possible comparison of hot vs. cold brewing entirely unmentioned.
But one thing I noticed was the way the article measured the number of cups that can be produces from X amount of beans or ground coffee. The article referred repeatedly to "6 oz. cups".
Who the Sam Hill drinks 6-ounce cups of coffee or tea anymore? Cups evolved into mugs, and mugs have expanded in capacity to match Starbucks-sized servings. It's not uncommon to see mugs that hold 16 ounces or more. Compared to those, a 6-oz. cup will look like a thimble.
Maybe the coffee companies should recalculate their figures using more realistic cup sizes. But you KNOW the coffee companies won't do it, because the way they figure the ratio now makes it appear that you can make more cups of coffee per pound of their product. So we have to redo the math ourselves to get realistic and accurate numbers.