My son went to a selective school at 13. Some of his friends and DCs of people we know went at that age, others went at 11. Others went to selective schools at 6th form or 6th form college.
Do those who do not agree with selective schools have a view about at which age it may be appropriate? In my DS's case 11 would have been (probably) too early. He was diagnosed as dyslexic age 10. An exam at aged 11 would probably not have been in his interests. I realise this will overlap with other threads, but am somewhat interested in others experience. If this overlaps too much with grammar threads , then I apologise and please just leave it. I post out of interest.