Did you catch that article about how most people don't actually smell their coffee before drinking it? I read somewhere that something like 80% of taste is actually smell working through the back of your mouth. That waiter probably knew to tell you to slurp it with some air, right? It makes a huge difference when you actually pay attention to the aroma instead of just gulping it down. I tried that trick with an Ethiopian roast last week and it tasted like blueberries all of a sudden. Crazy what a little technique can do.