Francis7,
The Coach isn't going to care if the recruit declares his college commitment or that he is the King of Norway on social media. There are plenty of recruits who do not publicize on social media for good reasons. That is a personal preference not a requirement.
The important thing is that your son and the coach come to a "meeting of the minds", and you have all your ducks in a row with Financial Aid and Admissions. Your son needs to fully understand what is being provided, what is expected of him, and when this is going to be finalized administratively. If the recruit has any questions, I strongly suggest he ask them now.
The Coach will be looking for the recruits ED application that he will have his Academic Liaison walk through to Admissions and track the ED application. If athletic money is involved, the recruit will need to sign an NLI. I strongly encourage anyone to read through the NLI agreement before signing. Typically, academic money is awarded with an ED acceptance letter and required academic metrics are spelled out. Those are two entirely different pools of money.