Long time lurker, but decided to register just to add my own story.
A few years ago my family of 7 was delayed leaving Orlando for a connecting flight in Phoenix. When we landed with 5 minutes to make our connection, I was sure that even if we DID make the next flight, we would be scattered in seats all over the plane (which was problematic since we had three under the age of 10). However, it turns out that SW had anticipated our needs, recognized us as we ran up to the gate, and led us on board the waiting plane to where they had roped off 7 seats together in the rear. Great customer service!