Is there a shift in human focus and concentration, or is it just me?While waiting in the foyer of a well-known seafood restaurant in Kansas City, I counted a half a hundred people milling about, engaged in some form of interaction – primarily with themselves.Yes, there are others with them, but these people are head-down on their phones. I’m certain you have both seen them or been one of them. Maybe you’re reading this on your mobile device right now.Phone usage and etiquette have changed significantly during the past few years.