Update: Just had a long talk with DH, and we've made the decision to have DS6 take the WISC. If he gets the score, we apply to YSP. If not, we don't. Period.
And that will be that. No more retesting, barring something MAJOR that obviously and totally messed up his ability to do even passably well on the test. Like an earthquake during the test or his passing out midway through. I mean something huge!
Thanks all for your input! Such great help! I'm contacting an in-town psychologist on Monday to make an appointment.
Fingers crossed...:)