I felt this same doubt, especially when I was sitting in the waiting room at the psychologist's office while DS was being tested! I think we parents do have a pretty good understanding of how different our kids are from many/most of their agemates.

Interesting that your DD brought up skipping 1st. For kids with very high scores, skipping first can be a great option. In many districts, it's a "learn to read and do basic math" year, and it can be very dull for kids who already have that stuff down. When is your testing?