it’s just a case of when you think kids can mature and Rates of skill growth. Some people won’t have bothered for gcses (like you didn’t for 11+), but focus at a levels. For others it will be degree, for others postgrad or retraining.
@Namenic , I don't agree that it's just a case of when kids mature, though that's a part of it. It's fundamentally different because all kids are taught to prepare for GCSEs and A-levels, whereas many are given no preparation whatsoever for the 11+. The ones who get in are typically the ones who have been extensively prepared for it.
It wasn't a case of me "not bothering" with the 11+. I had simply never been exposed to questions like that before and it took me a little while to figure out what they were getting at. I distinctly remember looking at one of the verbal reasoning questions in the exam, and thinking about how bizarre and pointless it was - not least because the answer was so blindingly obvious to me that I had started to second guess whether I was missing the point. Speed is absolutely of the essence in those tests, so had I been used to the question type, I could have very quickly moved on to the next one. Instead, I spent a little longer trying to process it to work out what they wanted. I had never done a single practice paper - my parents didn't want me to go to the grammar school in any case, and I think I had been absent for the only practice paper that we did in school. My friend, on the other hand, had been doing weekly 11+ practice with her dad for the last 4 years. Of course she knew what she was doing with it!
I was no late bloomer. I knew at the time, without question, that I was the cleverest kid in my primary school class. My teachers knew it too, which is why they had moved me up to work with an older year group for much of my time at primary school (terrible idea, but again, that's another thread!). So I was a little confused when I didn't get into the grammar school and a few of my less able peers did. They were confused too. Thankfully, I wasn't traumatised by it, as my parents were very clear that they thought the comprehensive school was the better option in any case. They weren't wrong - I think I received a better and more rounded education as a result of going to the comp. However, it did highlight for me that the 11+ was more about preparation than ability.
One solution to all of that would be to have state schools do more 11+ prep for all children, to at least level the playing field a bit. However, so much of the 11+ is about practice, and if they spent loads of time on preparing for a pointless exam that wasn't relevant or important for the majority of kids in the class, then the opportunity to do other important stuff would be lost. Personally, I don't think selective education is important enough to warrant that, so I would save the time and let everyone go to a comprehensive school instead.