Oh, should I, shouldn't I? Here goes... Xenia, Firstly - I'm pretty much in the opposite camp to you in most of what you've said, but do admire how you remain pretty cool under fire! My main problem with what you've been saying is that much of your approach perpetuates the "right address" element of personal success. Yes, people who go to private schools and then to Oxbridge do tend to be more successful in terms of career and finance, but that's not necessarily a result of a better education, but of a perception of a better education - the "right address". This doesn't do anything to improve society, business, education, etc, as perception will be in some cases overriding other candidates who have had a genuinely better education elsewhere.
Let me try an example. I've worked in several universities, and at one point was in a discussion with colleagues from York (which is a cracking university) about a candidate who had applied to study English there. She was apparently brilliant, but they were saying that she would be better off going to Cambridge as it's "the right address". Now, English at York is seriously good, pg opportunities offer many things that Oxbridge doesn't, and she'd have been lovely to teach. I could not understand why, when they knew they could offer her an equivalent or better education than Oxbridge, they would want to lose her to perpetuate the myth that Oxbridge is always automatically better.
I think if you want to choose a school, or help your child choose a university which you think will help your child, fine, but it grates with me if you choose something that will help because of how it's perceived, rather than how it is.
Oh Lord - if you're all still here, well done...