IMHO, if boys who are old enough for school are often/regularly/usually too "socially immature" for school, then the yardstick for measuring what constitutes social immaturity is the problem, not the boys.
All kids are different and all that, but if school is going to be arranged by 12-months of age per grade, without flexibility for grade-skipping and/or subject acceleration or for kids having trouble to be held back without stigma, then the social demands of school need to work for the maturity level of kids who are within that age range.
Sorry, but I always find myself getting a wee bit huffy over this subject because I generally think red-shirting is silly at best and is indicative of problems with our current system at worst.
