In reply to alexekins:
Sounds like he has had a good look around and started to get a feel for the Grit... Is he planning on coming back and actually having a go at some hard climbs at any point, it sounds like he may have some climbing potential.
The final line of your post is the important on "He goes home tomorrow a very happy 15 year old". It wouldn't matter if the previous 5-6 lines had said he fluffed a VS and climbed a severes. As long as he had fun. b
It does sound like he is an awesome talent and I have only read good things from people who have met him. Sounds like a really nice lad...tell him to come back soon.