acs - I've read that article and I totally agree with it for some kids (not just boys). I think it definitely was true for my DS7. He went to kindergarten old for grade (turned 6 in Oct after he started K). I think he learned a lot more that year before K (and was a lot happier) by not going to school a year earlier. We did an all day, structured rigorous kindergarten. Just because a kid is HG+, doesn't mean he/she is emotionally and physically ready to sit and listen (and buy into) a teacher's agenda all day.
I know another MG boy who went to K the same year as my son. He turned 5 right before kindergarten started. He was very engaged in kindergarten, and his general behavior was considerably better than my DS's. He is a kid that likes structure and rules. It has a lot to do with personality and temperament.
