I'm hoping that subject acceleration will be going to higher grades and working with older kids, doing higher level work. While my son is immature in some things with play, he does well in advanced academic situations with clear cut rules. I feel he needs to be exposed to kids thinking on a similar level to him and to not always be miles ahead.

Plus it will cost the school nothing, since they'll just send him to a different class for certain times. I'm hoping they'll find this aspect attractive, as it won't require any extra materials or teachers.

I'm going to look for the books you mentioned. I'm currently reading Raising Gifted Kids: Everything you Need to Know to Help you Exceptional Kid Thrive by Barbara Klein, which the neuropsych. recommended.