Most Late-Night TV Watchers Are Women, The Writers Men

“In the 1980s, [David] Letterman pioneered the kind of college-age male humor that dominates late night. But now, his audience is almost 55 percent women; [Jay] Leno’s is more than 53 percent, and [Conan] O’Brien’s just over one half. Yet the writing room and sensibilities of the show itself remain largely male.”

Source: The New York Times 11/12/09