Thanks to everyone for the thoughtful responses.

There is so much to learn and many forks in the road.
We will retest achievement and if results warrant it push for another grade skip. I am not going to retest IQ until at least six.

I will apply to the YS program with what I have and if that is not enough, there are other more important things to focus on, as a number of you so articulately pointed out.

Looking forward to more interesting discussions in the future.