Yeah, its probably fake... maybe Texan, if anything.
I think hers was a bit more real, Rue McClanahan was from Oklahoma, kind of southern. I think Michael Cain did the best faked southern accent.
Interesting, I suppose we all have our regional rivalries, mostly "All crazy nonsense" as you say. Yours is a bit backwards from ours, Southerners are generally thought of as poorer and less educated. Yankees as more the rich snobs. The US Civil War, or the war of Northern Aggression as we call it, was probably the most important event in US history, after the Revolutionary War anyway. And while it has created lingering feelings, particularly in the South, I think even most of us Southerners now recognize it as what ended slavery, a good thing.
Oh, when you travel to the US South be careful who you call a "Yank", very different meaning here, LOL!