The pose on the front cover says a lot more about the photographer's and editor's squeamishness and conflation of breastfeeding with sex than about extended breastfeeding.
I think Alyssa Milano tweeted something at the editor to the effect of 'NO, you are supposed to be making things easier for breastfeeding mothers, not more difficult' and I think she is right that this is the image people will have in their minds if someone decides to be upfront about 'attachment parenting' or 'extended breastfeeding' and that it will make a lot of other people wrinkle up their noses.
I did it before it had a name, and I felt it was no-one's business but my own -- and it didn't look one bit like the picture. I called it me being a mother, and breastfeeding.
I agree that normalisation is the way forward but this is not the way to achieve it.
(Unfortunately there are a lot of 'Eileens' about)