My oldest daughter was born on Oct. 31st. I have always regretted that we had to start her in school when we did. She is on the younger end of her grade and while she has done fine in her academics, the social aspect has always been a struggle, the pressures to drink underage are immense.
Its crazy how much of a difference that year makes. If your child is in the territory that you can choose to hold them back.....do it.