I'm very sceptical about this. Children programming at 3, discovering limits of 3.1 and moving on to linux at 8, etc, etc. I don't know. I have two kids (8; 10) and know a lot of a similar age (family, friends). None of them are this smart. Reading - yes, technology - not so much, just basic skills - paint, excel, word, games, that sort of thing. Linux cli? no, not yet.

Had a chat with my wife who has degree in education, esp early ages. She used to work in kindergartens and schools, and yes, the development varies a lot in young ages, but programming at 3?....

PS. I know it's bit vague and sorry no sources with data points at this time.