I have only wonderful things to say about teaching my dd to read. Even at just 4 years of age, it is already opening up doors for her. She has Down syndrome & although she doesn't have "strong" features, she is still recognized as having DS quite often. People usually have a preconceived notion of what DS is like & often judge her before they get to know her. When they find out that she has been reading books since she was 3.5, it shatters a lot of stereotypes & allows them to learn that she is a unique individual & get to know her for who she really is.
At this point I don't think my dd even realizes that it is unusual for kids her age to read, but once she gets to school & sees other kids just learning to read I'm sure it will be a great boost to her confidence. Even if she ends up being behind in some areas such as gross motor, she will have one area that she really excels beyond the other kids.
Another great thing about being able to read it helps her understand things. For example, at the pool, she can read the sign saying "pool closed" . It sure saves me a lot of fights when she can read the rules.
It helps her be more independent. She can read a simple kids menu & choose her own meal & make other decisions.
I think I could go on & on with this subject