First, I wouldn't tell him what the results are. There is no reason he needs to know at 6. I have a 10 year old in a 6th grade self contained gifted program and she doesn't know her actual scores (just that her tests showed she needed more of a challenge).
Second, the number one issue we have had is teaching perseverance since most things just aren't hard for her. We have had to branch out to find ways to actively teach this skill. She runs with me at a local track and is up to a 5k, she stacks firewood, etc. They aren't academic challenges but the ability to work through a challenge is the ability to work through a challenge and I have already seen it translate to academics on the rare occasion she is faced with something that she has to think to accomplish.