It is no secret, of course, that people have strong feelings about fat - feelings that seem only to have been inflamed by the sense, in western countries, that there is an obesity crisis afoot. Concerns about health have mutated into a kind of panic attending any mention of fat people at all.
A certain kind of person in America loves to note that they're currently soldiering through the latest Pulitzer winner for history, in particular. It connotes a certain gravitas, a connectedness to the literary and intellectual scene that most upwardly mobile professionals in America still desire.