Debate rages on the issue... at least at El Reg, where they seem to find it quite amusing.
While early last month a research by King's College's fellows demonstrated that the G-spot is nothing but "a figment of women's imagination", based on self-reporting by twins, some week later French scientists criticized the findings questioning why the G-spot should be something genetic. These criticisms were made at the G-Day conference, whose organizer, Sylvain Moumain suggested that, while the G-spot exists in some 60% of women, the British are just unable to find it. In the words of gynecologist Odile Buisson:
I don't want to stigmatise at all but I think the Protestant, liberal, Anglo-Saxon character means you are very pragmatic. There has to be a cause for everything, a gene for everything. It's totalitarian.
The debate seems to be far from closed.