Some of the discussion depends on how the word “grammar” is defined, I think. Some people use it as an all-encompassing term that includes punctuation, capitalization, word study, parts of speech, sentence analysis, and more. Others use it to refer just to parts of speech and sentence analysis. So that distinction is something to keep in mind when trying to figure out different philosophies.
I’m not sure how the author you mentioned is defining “grammar,” so I won’t give an opinion on that quote; however, I’ll be happy to jot down a few thoughts on some general philosophy differences that I see between the modern classical approach with the trivium and CM.
One of the biggest differences is in which comes first: analyzing or seeing the big picture. It seems like classical puts analysis first—looking at the pieces; then later, shows how the pieces fit together. Charlotte gave children the big pictures first, allowing them to form their own connections between them, and introduced some analyzing later after that foundation had been laid.
So for parts of speech, for example, she gave children a rich environment of good books and plenty of time to hear the English language well used. She gave them opportunities to use the language for themselves in oral narration. Then from that foundation, and when they were developmentally ready to think in abstract term, she introduced the analyzing part. Parts of speech is a very abstract concept, because it deals not just with words but with words and where they are placed in a sentence and how they relate to each other.
Another big difference I see between modern classical and CM is in the goal of education. It seems that classical is focused on exercising the mind, whereas Charlotte’s goal is to feed the mind with good ideas. Now, given the right quality of ideas the mind will naturally go to work. But that was not her main focus.
Another question I would have regarding the quote, along with defining “grammar,” is Are the children supposed to be going over the same material every year or is it more of introducing some one year then continually expanding on that and building on that in subsequent years? Charlotte would not endorse repeating the same lessons/material every year. She emphasized teaching something once, expecting the children to pay full attention, then holding them responsible for what they learned. They were expected to apply the concepts they learned in grammar, for example, in subsequent years; but the same material would not be rehashed every year.
The new video in the Learning Library, The Natural Progression of Language Arts, might be helpful in seeing how parts of speech/grammar fits into a CM philosophy.
I hope these thoughts help a bit. 🙂