The Publishers Weekly list of the "100 best books of 2009" includes shockingly few works by women. So what else is new? The Sisters in Crime response has been posted by SinC President Marcia Talley at http://sisters-in-crime-sinc.blogspot.com/.
Take a look and offer your own views on the topic.
Because there are so many great writers who are women. I suppose it's possible that, as a gender, they had an off year--but that seems improbable. As in: not probable.
I'll bet this is a generational thing. I'll bet any woman--or man--who's complained about the outcome is over 40 and still fighting last century's battles.
Because today's youth and young adults are post gender, at least in regard to their views of their own professional options and the innate abilities of their peers.
In regard to the publishing industry specifically, it's not like it's ever been a hothouse of gender discrimination. Edith Wharton won the fifth ever Pulitzer Prize for the novel in 1921 and today women make up a majority of publishing industry professionals. I wouldn't be surprised if women constituted a majority of PW's voting panel.
To explain: I work with people in their late teens and early twenties, and they are most decidedly NOT post gender, in any sense. In fact in some ways they're often less sophisticated in their understanding of gender issues than we were back in the day.