I'm subbing to this thread now because after reading it, I'm considering EarthSchooling kindy for my dd. :)
As was mentioned above, I like that it's flexible for those who want to 'bend the Waldorf rules' a bit. I love how the Waldorf ideas help me not to PUSH my gifted daughter too much or too excitedly... but I also think that it's possible for a child to "incarnate" (using their terminology) before age 7. I don't think there's a cosmic law saying it never happens earlier, I think children are still individuals! And I don't believe in the anthroposophy anyway... though the description of the stages are very helpful, I think they're good DESCRIPTIONS and I don't worry about what they believe are the CAUSATIONS. Anyway, that's just my take on it, so if my 4yo daughter is starting to read and doing K-level math already, I'm not going to push her, I'm going to make sure she's doing lots of creative play and all that sort of thing... but I'm not going to stop her either. I'm very Montessori that way. ;)
In fact when I was recently looking at Oak Meadow, I was considering the grade 1 curriculum for her (looking ahead to the fall when she'll be closer to 5) because the K was way too easy. But I think the ES K is more appropriate for her.
This morning we did a family circle time using verses and ideas from the samples and also from another smaller K curriculum I bought and DD *loved* it. After that, we did an hour of handwriting and math... and she loved that too. ;) Then she helped me bake bread, then she played independently for most of the rest of the day.
My 12yo son is about "grade 7", which is grade 6 in Waldorf terms... and the ES grade 6 curriculum looks like it would be a good fit for him, even for next fall when he'd be "grade 8". We'd just do more advanced math, continuing what he's already doing, the rest of it seems fine. So I'm actually considering trying it for BOTH kids... Anyone ever try it (or anything similar) with kids who are at such a wide age range??? He did participate in the 'circle time' today, I made him do the finger plays and physical stuff ;) ostensibly to help be a model for DD but I think he enjoyed it too. ;)