It is possible that the decision makers will see thinks your way. I would be firm about them not taking one without the other if you belive them to be equally gifted. I would strongly suggest private testing for the shyer one and treatment if his anxiety levels are clinically significant. Choose a tester who is willing to get on the phone with the school and state your case strongly.
If you can travel to get to someone who authentically gets highly gifted kids. Dr Ed Amend is a good choice if you can get to Kentucky or Ohio. Sometimes our kids can be uncanny when it comes to gauging others perspectives. Particularly if the perspectives are negative.
Best wishes
Grinity
