In my opinion, Dawkins wins this debate hands down. Though I find it amusing to think what the Bayesians here will say about the part where a commenter asks him, "If you had to bet, what would you say is the proportion of alleles that evolve neutrally?", and Dawkins replies, "How I would bet should be of no interest to you."

Humor aside, as for Lewontin, I actually had the attitude of humble and judicious open-mindedness towards these controversies until a few years ago, when I read that magnum opus by him, Rose, and Kamin titled Not in Our Genes. Even disregarding the parts that read like a complete parody -- for example, when they advise us, apparently in full seriousness, to read Chairman Mao for enlightenment -- most of the book is such a blatant ideological hack-job that I was left wondering how anyone could take these people seriously. (To make the it even more absurd, I stumbled across that book in a university library while looking for Pinker's The Blank Slate, of which I found one single crisp-looking specimen sharing a shelf with seven or eight well worn out copies of Not in Our Genes.)