Hi Grinity,
He was 7 when he started Mavis Beacon program. He spent good 2-3 hours, just practicing and playing games everyday. (He gets quite obsessive!) After about 3 weeks or so, he was fairly comfortable typing without checking his finger positions. Once he built muscle memory, the speed part came over time. Since he loves creating his own stories, he was typing all the time, and it definitely helped improve his speed.

Now at age 8, I would say he is far more productive in his creative writings with keyboarding than writing on papers. He's got more than 50 titles (files) of short stories, essays and non-fiction, free-style writings on his computer.