No, they needed to burn off some fuel to get their weight down before takeoff so they were waiting there while that happened. That flight goes from KLAX to NZAA (Auckland, New Zealand) on Boeing 777's. My guess is they're always a little heavy on fuel when they leave the gate and then burn down that extra fuel weight on the way to the runway before takeoff. This time they just needed a few extra seconds to accomplish the fuel burn off.