Thanks for your reply polarbear. We spent a bad year for DS in public K where we encountered poor "customer service" to put it mildly and recently moved him to a private school for 1st grade (yes, he is 6 years old). So far, we have had no complaints but we are only 6 weeks into it. We will see.
I too believe that 7-8 years might be a better age for testing - largely because the child might be more mature and more in control of their impulses.
I will also try to find the local DYS groups and see what kind of summits, meetings and events they have locally.