NEW YORK (TheStreet) -- The restaurant business is notorious for many things; among them long hours, thin margins, huge sensitivity to both labor and input costs, and being prone to changing consumer tastes. Rising commodity costs, which worry me in general at this point, can wreak havoc. Success among publicly traded restaurant names is often fleeting, save for a handful that have had true staying power throughout the years. McDonald's is perhaps the greatest success story, with its long storied history and net profit margins in the 20% range, which makes it look more like a ... Read More