First off I am unusual in that I believe it's possible to get smarter through practice, recent developments in cognitive science have proved this. I also believe seemingly effortless expertise and talent is often hidden practice.
Recently a few I know did well in the 11 plus and gained a place at a grammar school, several also gained places at selective independent schools after exam success. I've overheard gossip that many of this group were 'tutored beyond their ability' and are certain to struggle going forward. This is the sort of sentiment I've also witnessed on Mumsnet.
My view is that intellect can grow 'cells that glow together grow together' and anyway this group have fairly won a place. So why this attitude? Is it sour grapes? For those that believe intelligence fairly static & 'you can't get out what God didn't put in', Grammar and independent schools have sets and stream do they not?
Another thing, as a society we value 'innate ability' and genetically bestowed genius, but should we not value industriousness equally? A 'clever' but lazy child that wastes their time at a selective school is surely less deserving of a place than a 'less clever' hard working one? Should we not also test for suitable disposition?