Yeah, I've noticed she often doesn't practice what she preaches. And I disagree with her on several points. But her book is a good bathtub read when I want something small and light. It gives me a chance to recover when my arthritic thumbs rebel against holding whatever 700-page tome I'm reading for pleasure at the moment. (I don't know why so many of the books I choose to read are so godawful long, though I think it may be because I dread having to choose the next one.)
P.S. Just read the article. I certainly agree that English punctuation tends to be more quixotic than its U.S. counterpart. There's a kind of laissez-faire attitude to punctuation and citation all over Europe, in fact. In Italy, for example, I was accused of having no soul because I want notes to refer to books that actually exist and just generally wanted things to make sense and be reasonably consistent, and there was a widespread feeling that the reason Americans cared so much about consistency is that they have no creativity and so focus their energies on the most basic building blocks.. And, more recently, I had to battle with a German author at some length about using a consistent format in citations. It was only when I explained that it was so readers wouldn't have to struggle to figure out where they could go to check sources, not because I'm a stubborn bitch who just wants her own way at all costs, that a light bulb clicked on above his head and he began to answer my questions.