It's actually an interesting point for us 73 drivers. DAL's 73Ns have tire pressure gauges but its not DAL policy for us to check them on the walk around. I flew with a CA last month who told me that he's noticed, especially on the first flight of the day, that the tires are routinely under inflated. I've starting taking a look and he's right often. There's a push in the department to change our philosophy to doing exactly that. Apparently, the SWA guys do it. Don't know if this was the case with 1457 but food for thought.