My concern about redshirting as it applies to me personally is that DD skipped K and so is in class with boys almost 2 years older than her. Not a big deal now because she doesn't care about boys but I'm a little freaked out middle and high school. And truthfully it's not just the boys, I'm worried about the girl politics too.

I see a HUGE difference between accelerating and (most cases of) redshirting: accelerating doesn't give my child a competitive advantage. I had to jump through hoops to get her the grade skip whereas anyone can redshirt their child with just their say-so. And schools have a vested interest in improving their test scores so who will say no to the redshirting parent?