Do book publishers' slush piles have much relevance to gender issues in sf/f publishing?

The latest Galactic Suburbia podcast-- episode 85, July 21, 2013-- is a must-listen for anyone interested in the on-going conversation about sexism in sf/f publishing. The podcast series as a whole, of course, is acutely tuned in to gender issues in our field,  but I was particularly happy with this episode for tackling Tor-UK editor Julie Crisp's post focusing narrowly on the failure of women writers to send out as many slush submissions as do men writers--an thus implying that that failure is the reason for the under-representation of women's work in the field. Alex notes in the podcast that the word she would use to characterize this post is "surface," and Tansy suggests that the post is "a bit disingenuous." The fact is, as Alissa reminds us, slush accounts for a minuscule portion of what gets published-- a fact Crisp neglects (or perhaps takes care not) to mention in her post. (She does not, after all, give any figures for how many slush submissions actually get published, or what proportion of published books were unsolicited submissions.) Sadly, a lot of people have hailed Crisp's post as a credible explanation for why so little women's work gets published in the UK-- as though slush has much bearing on anything other than itself. For a thorough discussion of Crisp's post and the context needed for evaluating it, I urge you to listen to episode 85.