I was very nervous of testing our older one (5 at that time). I knew it was a useful tool but I didn't really want to do it. I didn't want to find out something I wasn't ready for. I kept asking myself what I would do if he tested lower than I expected. I kept asking myself what I would do if he tested higher than I expected and most important I kept asking what exactly was I expecting. Where would I place him on the curve? Was I even ready to make a guess? I wondered if I even had the right to know. It may sound weird but it was a real concerned for me.
I'd tried pushing the idea of testing out of my mind till the day when I had rather unpleasant discussion with my son's teacher who accused me of being a pushy parent and my son learning only to please me ... We had him test very soon after that. It was one of the best things we've ever done regarding him being gt. The results were a real eye opener. It was no longer surprising that the teachers had no idea what to do with him. It was also pretty obvious that it would be very hard to accommodate him in a regular school. It validated DS request to be homeschooled and it made the decision to do so so much easier. The results got him to Davidson and it stopped all the comments from the teachers. It was simply priceless.
The bottom line is I know how you feel. BTDT but I am extremely glad that DS6 was tested. We will test DS4 too, most likely once he turns 5. I do worry that his test may not really reflect him though. He can be pretty unreliable, sometimes answers questions wrong just to see what happens and when he is done with something he is done. Perhaps he will mature my then. I also know that I will struggle about what to do with 2 sets of numbers from my two kids. It will be hard not to compare and unless they both test the same there is really no good outcome.