I have noticed that my regular order in a coffee shop: black Americano with an extra shot - often seems to take much longer to prepare than other peoples' orders. Five people who ordered after me were given their orders before me this morning (tea with milk, cappucino, Americano, can't remember the others). It happens whether I'm in Starbucks, Pret, Costa, etc. Why is this? Would it be quicker if I ordered an espresso and a black Americano separately?