From what I understand, the short answer is "No, they don't". The long answer is "They don't yet, but if we keep telling people they do and everyone starts using semantic HTML, they will".
> and everyone starts using semantic HTML, they will
Eh, I doubt it. The problem with the "semantic web" is that your semantics might not match my semantics. You might use <article> only for the main content of an article-like page, whereas I might use it for each separate piece of text.
Eh, I doubt it. The problem with the "semantic web" is that your semantics might not match my semantics. You might use <article> only for the main content of an article-like page, whereas I might use it for each separate piece of text.