I found that many people in NJ like to redshirt, girls and boys. Just to make sure their kids are in the top tier, even if they could handle K at the regular time.

There have been many articles written about it because these kids can drive in 10th grade, go through puberty before other kids, which can be awkward. Even the dating issues. If you have skipped girls dating redshirted boys in high school, that would make me uncomfortable. But how do you tell your kid not to date the 19 year old in your class because she is only 15. They are in the same grade.