Is there a SWA culture of slamming the plane down? Or are there some other American cowboy cultural attributes at play here?
Why would anyone purposefully slam a plane down? People usually remember the landing after a flight, especially the rough ones. No pilot is purposefully going to plant an aircraft unless its for operational reasons.
As for cowboys, they can be. Those guys are paid to get from block to block as quickly as possible. They're not paid to go around, taxi slowly, are take the long way home. Some guys really push the limits and those that don't are chastised by the other pilot. The bang out lots of flights, push themselves hard, and push their airplanes hard.