What exactly does a Starbucks 'Expediter' do?

An enjoyable read.

How Hard Could It Be?: Good System, Bad System - Starbucks - company culture: "Expediters are not really there to see to it that a customer's order is filled more quickly, they believe. Rather, expediters exist solely to prevent people in line from giving up and wandering off, maybe to go to the Dunkin' Donuts around the corner. Once a customer places an order, the logic goes, he or she feels an ethical obligation to wait for it to be filled, no matter how long the process takes. Expediters are there to lock in that order as soon as possible."