Certain speech difficulties are believed to be caused by a deficiency of folenic acid (folic acid that is more bio available) in some individuals. Our kids take a suppliment from Kirkman Labs that is folenic acid, trimethylglycine (which is thought to improve speech and cognition as well as boost the immune system) and vitamin B12 in the form of methylcobalamin (which helps repair neural pathways and guards against glycemic reactions).
Our kids are like that, too - genuine I mean. Sure, they try to pull the wool over our eyes from time to time, like any kid. I can always trust their intuition, though, and if they don't like someone from square one then its no go as far as I'm concerned.
It is really good to see his picture. Your boys are sweet little fellows.