That's a ridiculous comment and she's just feeling jealous and bitter. However, i am not a fan of the grammar school system because (same as PiscesMoon) I think it's totally untrue that it gives poor but bright children an equal chance. That may have been the case 50 years ago, but not now. There is nothing equal about it when they are being measured against middle-class privately educated hot-housed and tutored children who may or may not be as bright, but have had enormous amounts of support and have been taught the tricks and strategies to get through the 11 plus since they were 7.
Some areas (such as Bexley and Bromley boroughs in Kent) are awash with grammar schools and can therefore take around the top 25% of children. I grew up in those areas and it seemed to me there was a selective state school every five miles or so. Where I live now (Essex) we have far far fewer grammar schools to go around so they only take the top 2-5% of children. The two in Chelmsford and the two in Colchester are consistently judged as being in the top 10 (and they frequently appear in the top 5) in the entire country. But that's hardly surprising when it's so super selective, is it?!
I've tried before to find out the percentage of children from private school backgrounds currently taking the grammar places in Essex but I can't seem to find an answer. But moving in the circles that I do, I can tell you for sure it is very very high.
It's not fair, or right, but it's a fact of life. (And I do privately educate my children so I'm not bitter and twisted!) Besides which, I am uncomfortable with the notion that the state should treat some children as more special and worthy of a quality education than others. I'm all for streaming and teaching to ability, but that can be done in a mainstream mixed ability school surely?
Many teachers in grammar schools will tell you that the privately educated children often flounder a little once the coaching had stopped and their parents have relaxed, goal achieved, whilst the very bright state school children take off. Well that's all very well, but it's no consolation to the parents of the very bright, state educated also-rans who couldn't afford coaching or didn't realise they would need it to stand a cat in hell's chance!
Look at it from the prep school parents' POV - Paying for a grammar-crammer prep school is their investment for a stronger chance of a grammar place. No need to continue paying through senior school when a little pushery-shovery in the first few years secures you the very best education for free, is there? Private and state pupils will all find their own natural level once there, agreed, but once your child is in that outstanding school, with its fantastic teachers, and its beautiful building, with its impressive name and reputation to go on the CV, and an academically inspirational peer-group with no 'bad apples' to disrupt class and bring down the tone, who cares if they are bumping along at the bottom? The kudos is there for all to see, job done!