Hi,
We also did some research in the DAN approach and decided that our son did not really meet the usual criteria.
He has no GI or food or allergy issues, sleeps well, is not hyper nor has low weight or low growth.
After talking to the Autism Research Team, we decided that there really wasn't any concrete or publishable evidence that DAN really Defeats autism in any way. There are really just anecdotal stories about it, but not any testable results really. While it may certainly help kids that are GFCF sensitive or have other GI issues. It seems to help those issues and behaviors stemming from that and(to us) not really the autism itself. But good luck.
KF