I respect Bicycle Quarterly and love the technical articles. Their recent study of rolling resistance for wider lower psi tires seems to make sense, as many have embraced the 650 concept running 38's or 42's.
But on my rollers last night I pumped the tires (Pasela 28's) up to 90 after sitting for several weeks and was shocked by this simple change from my last ride. The resistance difference was huge, almost where I thought of dropping some air to increase my workout. I know this is no big discovery, but doesn't this simple "experiment", all sceince and technical jargon aside, demonstrate or prove that only narrower, higher psi's offer the least rolling resistance?