sorry for digging up this old thread, but I have one remark that's been on my mind since I saw your post:
I knew how to read and write when I was 4. I don't remember how I learned it, but I guess I wanted to learn it, or found it fun.
Are not all people like that? Do other people only learn to read when forced to at school?
Is there a correlation between programmers and people who learnt to read before school?