Not to disrupt such an informative back and forth on Looney's, but a serious question:

How prevalent is it for kids to start kindergarten as 6 year olds in Baltimore, Md-suburbs of DC, DC or NoVA? In other words, do boys with Summer and even Spring birthdays typically wait a year to start kindergarten in these areas?

I was talking with friends with kids in private school in a couple of larger Southern cities and was amazed when they said it would be (and has been for years) unusual for boy born in April to start kindergarten as a 5-year old in their cities? They said this was also somewhat true of the parents they knew with kids in public school.