I hate all stereotypes against me. I believe all stereotypes against anyone else. And apparently, there appears to be some sort of confusion. When she says south, she means the southern part of North America, not South America, for you foreigners. There may have been some confusion.
And the stereotype of "y'all" is valid. The only problem is, y'all is a real word. It's a contraction of "you all." I say it all the time. And we take Yanks as being uptight snobs who are in love with their money and mistresses.