As I thought, not committing probably had a lot to do with it.
While I understand this really stinks, IMO it is unfair to lay blame on the coaches and now your son understands how important it would have been to accept even when given a time frame. Understand that in most cases the recruit does not have time on his side when making a decision unless he is a top prospect.
However, I am a very big believer that things happen for a reason.
This might be a good time to regroup thoughts and just sit tight, or perhaps redirect the search, perhaps closer to home if this is important to him.
Also do not rule out a JUCO opportunity.
What ever you do, do not let your son settle at this time just because others are, there are opportunities that will open up in the spring.
He sounds like a good student, his focus should also be on degree offered and all that goes into that part of the process.
Keep us posted.