Short version: It's BS.

Longer version: it's a report from years ago and an IQ test. You should not focus on the IQ. It doesn't matter. The diagnosis, well, it's medical and pathologizing. The criterias for autism in the DSM 4? 5? aren't that good. Nowadays, we understand autism in a complete different way and intelligence isn't part of it. What you will find written in the report is based on the point of view of neurotypical looking at and comparing something different. It's a one way assumption. This isn't the reality. They have to take in account how the autists live and experience the life. This is very different and shows that the criterias aren't as accurate as people thought.

You should not take this assumption about logic in the document too seriously.

This is doing echo to my own experience. I had some difficulties learning part of math and physics. Many teachers and professionals said that I would never get it. I would never do anything in my life. I did a formal IQ test and my score went above scale. But, I still struggled in part of math and physics. Later, I had the chance to empower myself. At this point, I understood why I struggled. I'm self-taught. So, the teachers and other professionals were wrong and the learning system wasn't adapted to my style of learning.

I started over. I respected my own style of learning. I didn't struggle.

What is in a document when you were 6 yo is a statement made looking through a disforming prism. I don't think you should give it too much credit.

The other point like for sudoku, you are using a lot of energy for many other things at your age. This was another issue. I used my energy masking and being with others. I didn't use it to resolve puzzles. (I feel old writing this.)