I don't consider those to be facts because most of the things my sister has said were 'wrong' with DD are not true, or exaggerated. For example my DD can in fact read street signs. She used to walk all over our (small) town, to friends houses, school, library, work.
Actually, in my experience, you don't necessarily need to read street signs to walk around a small area you're really familiar with--you learn it by memory and landmarks. The problem would become more evident in an unfamiliar area.
True, she was in an unfamiliar area and a much largely populated area than what she was used to. She also had her learner's permit to drive and was in the process of learning to drive (practicing on streets, not just parking lots). And DD knows how to read, so I guess I am not sure where the criticism from my sister comes from.