Multiple posters have claimed differently, and you have given no reason for doubting them. In the rest of your post even you admit that you have now verified beyond reasonable doubt that this is more than "folklore". Why, then, would you persist in making such a claim?I see.
Sorry if I hit a bad chord on this with you, which brought out some defensiveness on your part. It was not my intention.
I'll just assume that your belief in reading being correlated to intelligence, was an off the cuff remark related to some past experiences or stuff which was read previously or "folklore".