Well, I remember some concerning issues with the DD's daughter in the past, so it could be that the neuropsych is harking back to those and feeling like the current situation may be a temporary peace? It does seem odd, though.

I wonder if he is just very interested in her? Sometimes some children evoke strong interest from adults. Our DD was treated a bit like a wacky curiosity by her preschool teachers, who urged us to test her (at age 3) I think at least in part to satisfy their own curiosity. They had no financial motive at all to suggest it. (We did not do this. She now is not nearly so noticeable.) Similarly, staff are curious about my DS at his current school--I know he has been an object of conversation among the teachers generally and I honestly wouldn't be surprised if someone wanted to test him to a high ceiling just to see what he could do.