re: Janie's photo of "The slaw line"...I had no idea that such lines were explicitly noted by authorities...but I have experienced the same phenomenon with grits.

On a trip thru southern Missouri doing an environmental survey, my partner & I ate breakfast at a small cafe where grits were not on the menu. Next day, 10 miles further south, grits were an option. The 3rd day, a bit further south, grits were added to your order as a standard.

Moral: something between de gustibus non disputandum and "that's how *I* learned to do it, and those other silly ways are highly suspect!"

(thanks for tolerating me in spite of my flaws, Janie. ;>))