Haha, I can kinda agree with you on this point. And I will admit I do love a good Starbucks VIA Italian Roast (Instant Coffee). But Keurig stuff just tastes like shit to me. Also the local coffee shop only sells watered down lightly roasted acid.. So can I tell handmade from instant, no, not always, but I can always tell you whether I like it or dislike it. And I always, ALWAYS drink coffee black. If you don't you get no say it what tastes better, cuz you just watered it down with milk and destroyed any flavor it had with sugar...
I have not, perhaps I should. My biggest beef with the K-cups is that it always seems to be too watered down. With the VIA (or actually brewing my own) I can control the strength(water/coffee) ratio more to my liking. Granted, I probably like my coffee darker and more "dense" (full bodied) than most... I tend to gravitate towards the French Press and Moka pot brewing methods. (The moka pot is something I discovered when I lived in Italy, it was really the only method I saw people brewing in their own homes, and I found it works great for me, in that it's smaller quantities (I'm only a single dude, I don't need a full drip pot..) and "fuller bodied".)