This is a useful and impoirtant resource, since all the guest experts essentially said: "There is no such thing as race", and that race is practically a meaningless concept. We need to use things like this to bolster our own case.
Well, it certainly demonstrates the liberational capacity of science, when applied exhausitively: it also stands up our position, since we've been claiming the same thing. The trick to be getting the science out into mainstream thinking.