Given that our son is the youngest second grader in his whole school (we started him just after his five birthday), I am interested in this topic and frustrated by redshirting for children who seem quite capable of handling kindergarten for no other reason than "giving him an extra year" (it always seems to be a him). I'm not talking about cases where the child is notably delayed developmentally. DS has picked up on the age thing and it has been bothering him. He did cheer up when I told him about friends' children in other states who were even younger than him and in second grade, too.
That said, I wonder about some factors in this study... were the children who were sent to school despite just making the cutoff more likely to be smart or mature already? Or, were those who were held back those who suffered even a year later from not being well suited for the sit and drill classroom?
