I am still using DHL ground for DFS (formerly ETS) prints coming to my theatre. The price varies considerably from around $15 for a short film in a box to $30 for a longer film in two cans. Nine times out of ten, the prints arrive the next day.
It is not without hassle, though. First I have to call DFS to verify they have the booking and the print ready. Then I have to call DHL to schedule the pickup. Often I will have to call DFS back later in the day to verify the print was picked up. I have had a couple bad experiences with their drivers saying the prints weren't ready and DFS saying the print was ready, but DHL never showed up.
I still ship all my prints back via USPS. With the newest rate increase, it is now cheaper to ship via media mail. Cost is about the same as DHL incoming. I only use USPS to save on the pick up fee for my remote area, which would add another $3 or $5 for each can.