We did something in the middle of those.
We didn't take them to hear the results because there was a lot of information to absorb and frankly it needed our undivided attention to process it all. We also wanted to be able to speak frankly to the tester without having to worry about how DS/DD might interpret the discussion and/or take things out of context. DS is 2E so there was a lot of information. I will note that our kids were slightly younger (9 and 7) at the time.
Once we had the results and had processed it a bit ourselves we then sat down and talked with each of them. We didn't give out specific numbers but we talked about their strengths, challenges and thoughts along the lines of using that tool that you mention above. They are now both in congregated gifted classes so a certain amount of disclosure was unavoidable. However, with them being in classes where every single kid has been tested we didn't want them to be able to compare precise numbers at any point either.
So far so good for us but as with everything YMMV.
