Gourmet coffee typically is roasted and blended from premium coffees available at the time and is not specific to any country of origin or region. The roastmaster has as much influence over the flavor as the coffee itself due to the way he roasts and blends it.
Specialty coffees are like fine wine and are specific in origin.
Like wine, some crops are better than others so the the body and acidity can fluctuate from year to year or even month to month. Acidity in coffee is actually good, if you like that kind of coffee. Espresso is a brewing method that involves forcing pressurized water through finely ground coffee to extract the most flavorful oils of the coffee. It makes for a powerful and full-flavored brew. Arabica coffees are grown at higher altitudes, producing a distinctive flavor in each type of coffee from a particular region or country.