I did at a very early age, and I can remember DH coming home from a deployment ( he was gone from 6 months of age until the week before he turned 2 the first go around ) and said are you sure he knows enough for his age, I think hes a bit behind and I looked at him like he was friggen nutso...boy has he ate his words ever since! He knew DS was smart after seeing him go through the last few years ago school and struggle with fitting in but being way over qualified achievement wise but I think hearing it from the testers in our post conference this summer finally hit home that this is something we need to deal with on a united front and he truly understood what I've been struggling to deal with all along with teachers and everyone with DS due to the levels he learns at.