ATC does treat SWA differently at times because they expect us to move quicker, but not unsafely. A few years ago I was cleared to land on 22 at HOU. Tower then cleared a Delta 737 for takeoff. Delta dii it slowly causing us to go around. No big deal it happens. What wasn't normal was the tower controller saying that he was sorry that he forgot that Delta doesn't fly like SWA. As for taxi speeds our FOM (which was approved by the FAA) has the max taxi speed of 20 Kts on strait taxiways, all other times it is 15