Yeah, I remember arriving in ORD before 6. Too bad the rampers shift didn't start til 6, so we'd get to sit there with engines spinning picking our noses until it was time for the morning shift to start.
The worst for that was the 5:50 departure out of GRR. GRR is Michigan, eastern time, and it's a pretty quick flight. We would often arrive in ORD just past 5:30, and have to sit til 6.