Bibliometrics

I have been reading recently Steven Pinker's The Language Instinct. In it he suggests that Noam Chomsky is in the top ten most cited authors in all of the humanities (apparently the others are Marx, Lenin, Shakespeare, the Bible, Aristotle, Plato, Freud, Hegel and Cicero). Wow. Chomsky is the only one of that lot still alive. Does anyone know whether his citations relate mainly to his linguistics work or to his more polemical stuff?