I'd humbly suggest that one should consider the Venn diagram of writers in general. Out of the entire population who is writing with regard to careful formatting? The large subset, i'd assert, would be academics. And to further prove the unreliable nature of impressions, I see in university the least use in engineering, (where MSWord seems to dominate). Also Europe seems to use LaTeX more than in the states, (again MSWord?); but perhaps that's because of the subtle demands of diacritical marks and the like.