Our return trip was uneventful. Although our JetStar flight from Melbourne to Sydney was delayed by both the plane and crew being swapped out at the last minute, and we got shaken down ($75!) to check our carry-on bag even though we hadn't had to do so on the way out on the same airline, we still had a four hour layover before we left for Dallas. The Quantas economy class was much nicer than the American Airlines one on the outbound trip: the seats were comfier and the food was better quality. They did such a good job of adjusting us to the time change that I didn't experience any jetlag to speak of.