I'm not sure not checking facebook during work hours can be counted as working smarter; it can count as, just that working instead of not
Probably also ties into the fact that this person's job seems very deliverable based. Maybe content creation? That is just a completely different set of requirements than most people's "keep butt in seat for 40 hours" jobs.
Similar idea to work "theming". It lowers context switches and let's you accomplish more.