Here's a preview:

"Second, redshirting is an arms race. Horowitz observed, "Some people think redshirting will give their kids an academic edge." Conversely, as redshirting becomes more popular, parents can be concerned that if they don't redshirt their children, their offspring will be out-competed for the rest of their school careers by older classmates who did redshirt."



http://www.isteve.com/2002_Redshirting-A_Kindergarten_Arms_Race.htm

No opninion implied, just found this interesting in light of how hard some of us work to do the opposite!