Is the social dynamic between you two such that you can just come out and ask, "Have you ever thought of having him evaluated?" Just being straight about it? That's more what I would probably do, and I'd do it in a way that communicates that I don't think it's a stigma. Like when my parents still whisper, *cancer* like it's not to be spoken aloud. Look her in the eyes, be quizzical, like, "hmm ... ya know, I wonder, have you ever thought of having him evaluated? If he has something like ADD or ADHD, he'll do really, really well if it's caught now instead of later." I dunno, maybe that won't work with your dynamic. I know that stuff can get sticky.
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