The book was written by a consortium of 23 academics and bloggers, primarily Americans, partially Australian, and with only a few Brits. The fact that a bunch of non-British folks are bitching about a British show lends them precious little credibility to begin with. Add to that that they're academics and feminist issue bloggers, I just really don't think the book should be taken seriously.
If they wanted to bitch about NCIS being racist, by all means, but Doctor Who? Sorry, not your country folks. STFU/GTFO.