In Valdorf schools,
"In early childhood learning is largely experiential, imitative and sensory-based.[22] The education emphasizes learning through practical activities."
http://en.wikipedia.org/wiki/Waldorf_education Children are preparing for reading all the time but with another methods.
Similar discussion was here
http://forum.brillkids.com/teaching-your-child-math/article-on-the-case-against-teaching-math/Some children did not learn math in a traditional way but at the same time they did something what can be considered a much better math education for this age.
And in general, I want to say something about the studies on early education.
(This is a first time I say it but I am thinking about it for years, since I am in Brillkids.)
There are several studies who say that some early skills are predictors of later success. Like this
http://udel.edu/~njordan/Jordan_Developmental%20Psychology.pdf Researchers do not consider that some children have parents who spend a lot of time teaching their children. And these parents who were good parents for 4 years old (for early readers, for example), they continue to be good parents in continuing years. These parents continue to encourage the education of their children and may be that is the reason of later "academic success". Who can partition these two factors?