As you may have heard, DHL is shutting down domestic shipping operations at the end of January. While you can still ship a package out of the country (or into the country) via DHL, you cannot send one from one point in the United States to another.
AppleCare used DHL almost exclusively for service parts. Our relationship with them was strained at times, as we often did not receive deliveries and the driver would often neglect to pick up machines destined for Apple repair facilities in Memphis or Houston.
Today, Waitsfield did not receive any shipments. DHL asked me to provide tracking numbers of our own shipments so they could send a driver!
Apple is completing the transition to FedEx in the coming week or so, and the delays should disappear when the switchover is complete. We apologize for any delays in your repair process as a result of shipment delays.