I don't know about that. Twice last winter, I had to run from one end of DTW to the other due to ground holds, weather, etc.

The first time, the GA shut the door and sent the plane on its way just as I was approaching the gate. She told me the supervisor didn't authorize her to hold the plane for me.

The second time, nearly the same situation except as I got to the gate, I thanked the GA for holding the plane for me. He said his supervisor told him to shut the door, but he couldn't do that when he knew two PM's were just arriving. Reading between the lines, he had some latitude on when to shut the door.

I didn't have enough time to give him a Job Well Done thingy.