Re: young kindergarten - holding back?
Well, I taught elementary school before becoming a sahm and my usual recommendation, especially with boys, is to wait. I think the oldest child in the class is almost always better off than the youngest and boys tend to mature more slowly when it comes to skills like sitting still that kindergarten demands from children.
The research you posted was interesting but I am wondering about why the repeaters did worse is that possibly because only the worst kids repeat and everyone else is pushed along whether they are ready or not? I have seen kids blossom when held back in the early years but it seems to happen very rarely.
I'd find another program and try and hold your slot for the next year.
Loving wife to Eric and SAHM to Egan (11/05) and Oliver (12/07)