Originally Posted by SJCFlyerLG
This was done during Skylink construction. I don't know what the correlation was, but once Skylink was finished, it was back to the tugs.
They were doing it long before they started to build the Skylink. Really, as long as I can remember flying out of DFW on MD-80s (which is a pretty long time). Also, I'm pretty sure it stopped well before the Skylink opened up.