It seems to me there isn't any news here unless the reader was uneducated to begin with. Physics apply when generating power, regardless of how it is accomplished.
Quote from the article: "Part of the discrepancy noted by Consumer Reports and documented anecdotally in AutoGuide reviews may come from the fact that so called “window sticker” fuel-economy numbers provided by the Environmental Protection Agency (EPA) are achieved through tests done in a lab, rather than on the street."
The driver's influence on any car's gas milage is substantial, this will always be an issue with the EPA fuel milage numbers. Possibly they are trying to indicate that driving habits are even more impactful on Turbo cars than NA...? (which we all know)... and if so they had a round about way of stating it.