It depends where he is the next two summers. Vanderbilt and Stanford are tough for the biggest and strongest, they are the elite. If you produce elite results and you are small, I don't know that it matters, but they are the top of the top. Quite honestly, Duke is very good in terms of recruits too. It is impossible to predict where your kid will be. Tell him to work hard. You will know soon enough by who is showing interest. I had no idea where my kid would be until end of rising sophomore summer when 4-5 of the same level schools started asking him to call. We have a 5'9 kid on our hs team, rising junior, who went from no offers to 5-6 top 25 P5 team offers in one week. Prepare and when the stage is right, perform. That's all you can do.