(impending anecdote) - this is something I noticed when I lived in the south for a while. More people tended to think before they spoke which would result in cleaner, less runny conversations compared to the typical word diarrhea I was accustomed to sifting through growing up in the Northwest. It was actually quite nice to deal with after a short adjustment period for me to discard my knee jerk reaction of assuming the heat fried everyone's brains.