@Brett I’ve lived in Atlanta for seven years and have never heard anyone say this in the wild. Maybe this is because I generally only order beverages in Georgia in Metro Atlanta, but really, I’ve heard people say people say this a million times, but I’ve never heard anyone actually say it.
Although whenever I go into an Atlanta restaurant that serves Pepsi instead of Coke I get all indignant. But that’s because I wanted a Diet Coke. Not a Diet Pepsi.