My DS August born, aged 11 has just started secondary. I would say he finally caught up academically last year.
Reception was fine - he has a wonderful teacher who, upon discovering he didn't yet have the muscle control to hold a pencil, devised exercises for him to do, drawing circles in sand. Why he should have been rushed to write at age 4 and a week is another matter, but the first year was generally fine. We then had the misfortune of needing to move him to another school. The school has a wonderful reputation but for DS it was a disaster. Year after year we were told by his teachers how "slow" he was and how "immature" he was. For god's sake, how mature is a 6 year old meant to be? He was verbally put down in the classroom by his wretched teachers, which made him a social pariah in a class where there was anyway an imbalance age and sex so that there was only one other boy like him in age and maturity. One of his teachers would repeatedly say: "oh you're so slow, what's the matter with you" in front of the class (I witnessed this myself when collecting him one day and obviously pulled her up on it, but the damage had been done by then). Clearly he'd been labelled by teacher after teacher as "slow" etc and it was only in Year 5 that a new teacher to the school looked at us at the first parents' evening and said "I don't recognise the child described by my colleagues - he's absolutely fine, what's the problem?" Sadly, five years of put-downs and difficulties socially did their bit in taking away his self-esteem.
Several things have turned this into a happy ending: 1) he made a few good friends out of school who have made him realise there's nothing wrong with him socially; 2) we got him a tutor in year 5 to build up his strength in maths (which he is good at) and the weekly one-to-one and constant encouragement have made him blossom academically and 3) he is now in a new school where he has reinvented himself as the bright, confident, lovely child he is.
The moral of this long story is this: teachers in primary schools MUST have a better approach to teaching summer boys and girls. It is an absolute scandal that, given the absurdity of the rigid intake rules, that there is no programme to ensure our children are given a positive start to their academic life. This isn't just a matter of making children ready for university - it is a matter of making sure they are ready for a life of enjoying learning, not creating years of misery, and in some cases I've seen, turning them off schooling entirely.