Coffee expert asked to guess difference between cheap and expensive coffee

And so, once again we come to a close of the wonderful entertaining topics led by BoingBoing on this fair Wednesday. There has been a fine amount of assumption and consumption, a lesser degree of statement of fact and my personal experiences with Instant Coffee. Others told of their battles with the daily sludge, while still others praised their only cup of choice, whatever that was. And only one reference to Civet cats.
Good day to you all, and remember, It’s not coffee unless you say " Ye Gods. Who made this muck?!!"