Just my opinion, but that statement is kind of broad. Well designed pedals with true bypass will usually yield better tone (whether they're on or not) than a single processor. With digital processors, you're adding extra steps with a/d/a conversion and sometimes shotty software (unless we're talking your high-level TC Electronics Units and the like). For the price? Most likely better than a bunch of cheap pedals. But if you have the money or already have the pedals, buying some digital floor unit would be a latteral move at best... money better spent on good cables, batteries, and smokes.