So is that where the "official south" begins? I knew the "Grits Line" was somewhere just east of Dallas, but I didn't know where. I call it the "Grits Line" cuz that's where grits are standard side order in diners.
There's also the "sweet tea line" -- the line (somewhere in southern Virginia) where, south of which, your iced tea is by default served extremely sweet. North of the line you get asked, or simply by default, you get served unsweetened tea and will have to find a container full of sweet-n-low hiding somewhere on the table.
In Texas, the tea is always served unsweetened -- and that to me, makes them "western" not "southern."