Laura,

I don't think SCAT (raw and scaled score) for 2011 is not out yet. It looks like 2011 score is higher. My DD7 got 443 in Math and her percentile is 86. It may be a little lower for your DS.(boys do get higher score)

I do not know where you get your percentile from. Is it in your DS's student participation report from CTY? If Math is 443, your DS should qualify for High Honors award. (look for it in grade 2 line and should also be in the report from CTY)

http://cty.jhu.edu/ts/awards.html

Any level of enrichment is better than none and pretty soon, your DS will outgrow that arrangement as well. We are thinking of self pace CTY online classes (Math) during school for our DD.