I have a high IQ as well as ADHD and Autism.
Out of context, scoring as high as I did really meant next to nothing. In the context of the diagnoses I received later in life, definitely made sense, and helped color a picture painted in two solid days with a psychologist.
Somehow, I think it's important that the IQ test I took was not called an IQ test to me until after. Like, I knew I was in for tests, but more broadly told what things were about.
As a student, I had a science teacher who had been teaching many years, tell my mother he had never seen a student think in the manner I did. I was doing exceptionally well in class, but did not exceed in the fashion that would get me into an ivy league school, which at the time was supposed to be a goal. My father graduated MIT.
There are times when it's great. When I can focus on something, I can learn a lot and get very good at it. However, I spent decades with two obstacles I could never get myself past: the inability to keep that focus or control it, and the inability to even understand other people enough to try to get along with them long-term.
The result is I am just now, at 41, starting to figure out what I want to do with my life after way too long in a profession I should never have entered, and burned out of twice. And by burn out I do not mean tired and sad, I mean hospitalization.
In summary, it can be pretty great, but in my case it's fraught with difficulty as well.