I went to a Waldorf/Steiner school, which shares some of these traits such as the lack of a focus on assessment and grading and the emphasis on creativity. We weren't taught the alphabet until the age of about 6-7 and basic arithmetic at 7-8. We did begin learning foreign languages at age 6, however. In practice my older brother taught me to read and count well before the Steiner curriculum did, but I still think tha…
My then-girlfriend and I did some work to help start a Waldorf school in western Massachusetts, so I've had a bit of direct experience with Waldorf schools despite not having attended one, and I agree with most of your assessment: the focus on creativity / learning to teach yourself is a huge departure from the traditional approach, "here is how we solve this kind of problem, now practice on these other, nearly ident…
I think this came about partly as an extension of Steiner's views on television as something that stunts imagination and creativity. The first 7 years of the education have a very strong focus on mental imagery, and there is probably a belief that viewing concrete depictions of concepts on a computer is harmful.
I happen to believe that a computer can allow increased exploration of the imagination when used for creative tasks, but in the 90's schools were mostly using them for looking at Encarta and so on. That's exactly what Steiner schools want to avoid for their younger children.