Since taste is but one metric when judging coffee, and I stand by my Tweet that Dunkin’ Donuts coffee stinks, let’s look at what’s really important: the caffeine, or shall we say the vitamin content of the brew.

Dunkin’ Donuts 16 oz. coffee: 143 mg of caffeine

Starbucks 16 oz coffee: 330 mg of caffeine

As for Tim Hortons, I had their coffee at a very grimy store-front across from the DMV on 34th street. Unremarkable. As for the caffeine in a 14 oz coffee (Canadians trying to rip us off?): 140 mg.