Look Joe Stickler. I don't cook with a thermometer I cook off look and if I think it's done or not. Usually judged in some combination of beer and how many songs have played. It's guess work.
Good God man, that is all you hear about in the low country of NC and SC. Suspect its core is Charleston. I find grits revolting, but love shrimp, but all relatives will always go for shrimp and grits if offered.
Oh, just so "y'all" know, if is not just a bunch of breakfast grits with a bunch of shrimp thrown in. There is other shit in it, too.