I had my son tested by a grad student with the WISC-IV last month. It was a good experience. I don't know if scores would have been different with a tester who generally works with the gifted. We didn't expect him to qualify for DYS but his Explore scores were high enough that testing was worth the chance. And he did qualify!
My son's 9 and I think his age makes a difference. I think with a child at 5, you've got much more chance of boredom or acting out. We homeschool and so this counted for his school for the day, so he was motivated to do his best and not rush through anything.
I'd say we had a good experience
It was interesting seeing the report and hearing how he took the test.
