In Sunday’s Parade magazine, John T. Edge, the noted Southern food writer, weighs in on the nationwide barbecue renaissance. (By the way, if you haven’t seen Parade in a while, you might be stunned to see it today. It’s a deathly shadow of its former self, with a much smaller format and far fewer pages – more like a pamphlet than a magazine.) Edge writes that Americans have “adopted barbecue as our national folk food. … The new question is, how high can barbecue go?” It will come as no surprise to anyone who’s read one of these rebirth-of-barbecue articles…