What JOYN said.
When you have a DC so far beyond the norm academically that it's causing serious problems at school, you learn to shut up about it very quickly, other parents do not want to know about the (genuine) problems your DC is having fitting in. While is is ok for a DC to be gifted in sport of art, and indeed this type of giftedness is encouraged, it is not acceptable in this country for a DC to be academically gifted. "Bright" is often used as a more acceptable word than "gifted", but even that seems to be sneered at.
My DS1 had a hellish time in Primary school (at 5 he was assessed at the schools request, we were told his mental ability was then 13yr and 5months, and "Exceptionally Gifted"). School then refused to act on any of the recommendations for work enrichment - long and boring story but basically they felt Gifted children needed no help and it was sufficient for them to give him more work of the same level. Him crying daily on the way to and from school as "school is the most boring place on earth" was no concern of theirs (we removed him from that school at age 8 and regret we left it that long).
DS was not really in tune with school until about the age of 14, it was so boring and limited and repetitive to him. In the last 3 years of school he got on a lot better, was able to get his teeth into things and do his own, self motivated extension work, and of course academic achievement in the form of Highers/Advanced Highers became the goal.
Many clever and gifted DC are so put off learning because of a lack of provision for their needs, that they actually end up failing and dropping out of education. What a waste! For the individual and for the country. Why is it not acceptable in the uk to be highly intelligent?
And all the MN posters with "bright" DC - maybe this is the only place they feel able to say "actually, my DC is really quite clever at Maths/science/whatever!"
Puts on Asbestos flame-proof suit