It's understandably upsetting when you spent money just for DYS and then do not get any qualifying scores. However, you still have the same special kid you had a couple of days ago. He will continue to be able to soar as far and as fast as possible due to the efficiencies of homeschooling and the lack of institutional restraints. You must be doing a great job. It doesn't make sense to main-stream him just because he tested only moderately gifted. He will continue to develop at his optimal rate if you homeschool him.
At the same time, just because he is so different from the
local GATE kids doesn't mean that he won't mesh well with them. Not that it's particularly on point, but my DYS DS would not take history books home over the summer for fun either. Yet he somehow absorbs a lot of history and can incorporate appropriate nuggets in casual conversation and sometimes identify violations of constitutional rights quicker than I can.
I would think that his WIAT scores should be very high since you are already teaching him at least a couple of years above level. Perhaps DYS may overlook the IQ scores if the WIAT scores are way above the minimum? If not, then you can always try again when you have Explore, SCAT and/or SAT scores, assuming those come out super high.