A Language Myth?

Pace Guy Deutscher, John McWhorter argues that as "cool as it would be if grammar were thought, the idea is a myth":

Deutcher's favorite evidence is people who sense direction not as amatter of front and back but as north, south, east and west. In theirlanguages you say not "in front of me" but "west of me" and so on --meaning that where if we were turned around after saying something wasin front of us we'd say that it was now in back of us, speakers ofthese languages would still say that it...