This is just a life in general lesson I have learned. People like this get distracted by the next shiny thing and he will totally drop this. Just don't talk to him about it anymore and I personally would not send him any more results etc. That will just encourage him. He has shown no interest in this before, I guarantee you he will drop it.
I also would be willing to BET there is some kind of jealousy going on with the mother of the 2.5 yo and that is why all of this has been brought up. Some people have to push others down to feel better about themselves and some people view their child's intelligence as some reflection of their parenting skills.
GL to you!
