Apple's supply chains operate on a 6-day turnaround. That means that a MBP that just arrived in the warehouse today will be shipped to a customer no later than

Apple's supply chains operate on a 6-day turnaround. That means that a MBP that just arrived in the warehouse today will be shipped to a customer no later than a week from today. That is one of Apple's greatest strengths, and having that strength absolutely allows them to offer configurability.