No I am not familiar with this method, but will definitely look into it out of curiosity
The way I develop literacy in kids and encourage others to, is to teach a love of language and literature (books mostly) from an early age.
Before considering teaching a child to read, in my opinion and the opinion of many others, developing oral language skills is extremely important. Oral language is the foundation to written language. I have worked with many kids who struggle because their oral language skills are weak when they are introduced to reading.
Oral story telling teaches children the structures of stories and is a precursor to prediction skills (also important in reading) and in composition.
Reading with children from a very early age and talking about the pictures, the words and the events in a story are good foundations for reading.
What we know about reading is that it is much more than decoding words. Pictures (and later creating those pictures in one’s head) and other supporting cues such as context are important skills that a child learns through being read to and interacting with books with an adult or older child.
The ability to “play with words” by enjoying rhyme, rhythm, sound substitution and multiple meanings helps kids develop critical understandings of how language works. So while adults may consider rhymes and songs folly, they are really critical language building activities. As children learn to read, then, they can change “cat” to “bat”, and “kit”to “kite”.
It is so rewarding to see children pick up books over other toys and activities. You can see by this simple action, that they understand that there is richness inside, and that they understand the joy of literature.