I am wondering, did she actually comment on whether it was nutritionally beneficial or not past a certain age.
I know the Coca Cola thing was in relation to tooth decay, but I guess it's also kind of saying that there is no nutritional benefit either.
And then on her blog, she says that an older child should be comforted by a hug, not by a breastfeed.
So, in short, although she says she is happy for anyone to feed as long as they like, she appears to be saying that there is no nutritional benefit and it shouldn't be used for comfort.
No wonder she seems to struggle to "get it" then....