As a parent of children that go to school with these holdback or more likely prefist children I do think it is not the greatest thing for many of these kids. Many seem more aware being out of place when they were younger, As they got older it didnt seem to matter as much. Maybe they held it in better as they got older?? Years ago it wasnt mentioned..but now many of the prefirst kids hear comments on them being held back, For some reason more people seem aware of it now than before, even tho it has been done for many many years? Maybe due to being more now? Just my observations,,not a professional.