I don't really get what all the anger is about, TBH. Some parents are wealthier than others, and some parents care more about their kids' education than others. Those that have both the means and the will will ALWAYS put resources in that those who lack either or both won't.
Even in a purely comprehensive system, as exists in some counties, there is segregation by postcode as parents who can move into wealthier areas to get their kids into "good" schools. The question is not whether the grammar school system is fair, it's whether it's more or less fair (and more or less effective) than the alternatives.
We're in East Kent, where fortunately 25% of kids still go to grammar, so that rather reduces the tutoring culture. It seems that the places where it is worst are where you have one or two super-selective grammars catering to a whole county. Which is a good argument for either scrapping grammars altogether, or having more of them.
We had a tutor for our son for the 11+, once a week for two terms, but she wasn't very good and to be honest I did most of the work preparing him myself. He walked it and probably would have passed without a tutor.
I'm not sure about the whole three times a week from year 3 thing. My son got a bit overloaded by it all just from what we were doing and it started to become counterproductive. I'm skeptical of the degree to which a kid who really isn't up to it can be made up to it by sheer force of work.
There's a whole cultural issue at play though which is more diffuse, but no less powerful. We have brought up our kids since they were born to be excited about learning, to value knowledge, to experience reading and music and arts, to converse intelligently and to be comfortable with silence. We have no TV, and they have limited access to computer games, DVDs etc.
We read to them every night, and then they read alone in their beds. No media in their bedrooms. When they're interested in something, we talk to them about it, and spend time doing it with them. Preparing for the 11+ was largely just an extension of this culture which has always been a natural part of our family life anyway.
Am I "middle class"? Probably, whatever that means. Do I accept the implication that I am somehow responsible for compromising the prospects of other children by giving my own an "unfair advantage"? No, not at all. What I accept, reluctantly, is that I happen to live in a society where many peoples' idea of parenting consists of sticking their kids in front of some kind of media from dawn till dusk to keep them out of the way, while shovelling garbage into their mouths every few hours.
Very few of the things we do to actually RAISE our children cost much money. Most of them just cost time, effort, sensitivity and will. Yes, it's true that there are many families who probably couldn't afford the weekly tutoring fee that we paid, but I think that's being made into a bigger part of the issue than it really is. The truth is that we live in a very diverse society full of not just disparate wealth but disparate ATTITUDES to education and lifestyle. Of course these disparities of attitude will affect the children brought up within them. How could they not?
But it's bizarre how people so often react to this by blaming the people who are doing it right, and presuming that all the people who aren't are helpless victims.
I also reject the idea that all kids who don't get into grammar school are being told they're "failures" and "written off". There are plenty of good non-grammar schools in grammar areas, and particularly of course where there are only a few grammars taking the top 1 or 2%. If schools are not good, the answer is to make them better - and that depends on whatever children are there and their parents, not on the people who aren't there.
There are also plenty of children who go to secondary moderns who go on to have highly successful careers in all sorts of fields. My in-laws' family includes one who is a headmistress and one who is a billionaire international business tycoon. Many kids around here go to secondary moderns, DO thrive academically and then transfer to the grammar school sixth forms.
I don't think any education system is perfect but the grammar system is probably no more imperfect than most. Inequality is a social and economic issue, much more than an educational one.