Can the average person taste the difference of a high end cup of coffee. I am going to rule out McDonald’s and Dunkin’ Donuts and refer to the more exotic blends from your Starbucks and Caribou’s and other Specialty Coffee Shops. Can a person discern between Sumatran and Columbian, Kona and Ethiopian, or is good coffee just that, good coffee? I realize there are "super tasters" and "coffee snobs", but I am refering to the average "Joe" so to speak, can they really tell the difference? Cheers!