Touring Tyres / Touring Tyre Size

I've wondered, does the Fatties Fit Fine slogan thing on Surlys refer to tyres or to people? It makes sense for both really

I run 35mm on the Surly. It can cope carrying me (16stone) and all of my stuff, plus without a full load they're still pretty nippy for day to day riding.

On another related note: Get Marathon plus's, accept no imitations.