Cognitive development is affected far more by physical interference in a child's development through pregnancy, health in the mother, impact on the child's brain when young.
The brain has evolved over millions of years and that pace of physical development hasn't suddenly changed. We are the same when we are born (give or take a few pre-conditions due to gender and race) but these slight differences don't affect our potential to learn and study unless there is a distinct learning disability which is usually caused by some physical or chemical difference.
We are kidding ourselves to think that some people are born genetically special. The grey matter is just that, waiting for the windows to be opened, the information to come in and the pathways to connect. How that happens is entirely dependent on physical and neurological influences.
And gifted musicians don't count, music has a specific impact on brain patterns which is in effect another form of neurological influence.
There has not been enough research into this area because those funding and supporting research have a vested interest in maintaining the status quo. What boffin is going to want a thousand other boffins eager to take their place? We love to think of ourselves as better than all those foreigners who 'are really best at sport' and those working class people who 'just want a simple life anyway'. This ideology is verging on the immoral.
Any neurological research that does manage to battle its way through the half-truths (I would call it spin) goes to prove remarkable effects on the brain by outside influence.
Some children may have struck lucky some time in their development to be able to become extreme specialists when they reach full development and some children may appear 'brighter' than others because again, something has 'struck' and caused an extraordinary neurological change. Sometimes something strikes that has a detrimental effect on the child as well but it is rarely permanent unless there is damage.
No child is born into this world more capable than another of achieving 9 A*s. To presume so is really just a bit thick.
These bright children level out eventually. I don't see why they should get an opportunity to go to a more pushy school when they are already at an advantage.
Am I the only person that believes this?