You are right Pastorp, when I lived in the south, I realized that it was not for me to change the way folks live there, but it was my job to try to adapt, which I did very well.
sometimes I did get to talking too fast..and was told, "just wait a New York minute"..which caused me to chuckle..and correct myself.
I lived there long enough to find that the best way to apply the correct speech speed and inflection, was to pick up the local accent and expressions.
That worked very well and also worked to smooth my acceptance by the local folks.
Now grits...where did I get the idea that grits were that small, embryonic tip on each kernel of corn? Are "hominy grits" one and the same?
BTW; There is no better way to get folks ready to kick you to the moon, than to give them the idea that you think they are stupid, or somehow inferior.
The folks from those big cities you mentioned, also try to treat we rural folk that way..
..But we have fun playing them...just like playing a cat or dog with a laser pointer...