So.... you don't believe in the g-spot because you dislike the French, and that makes the British scientists the ones who are right? That's what I'm hearing from your post.
I don't believe I said anything at all about the G-spot, but if you are asking, I can't think of any one aspect of sexual function or preference that could be applied universally to every woman I have been with.
Do some women derive sexual pleasure through stimulation of the anterior vaginal wall and the underlying area about 4-6 cm from the vaginal introitus? Yes I believe some do, and if you want to call that area the G-spot that's fine with me. Do I believe that applies to all women and the one's who haven't experienced it just haven't explored themselves adequately? No, I don't.
Different women derive pleasure from stimulation of very different "erogenous zones" in different ways. The majority of women enjoy cunnilingus. Some don't. The majority of women enjoy having their clitoris stimulated in some fashion (vibrator, tongue, fingers). Some can't stand it. Most women don't particularly care for penile-cervical contact. A few love it. Some women (I'm told) orgasm from anal intercourse. Many abhor it. For some women stimulation of deep vaginal areas in the anterior or posterior fornix area are important for achieving orgasm with penis-vagina intercourse, but in many it isn't, or is uncomfortable.