Do you think the search engines are intelligent enough to use semantic structure as a signal of quality? If so, to what level? Ever use JAWS? Would that type of processing ever be applied from an indexing standpoint to determine document quality?
I always start from a stand-point of what I would use if I were a search engine. And yes, I would be using several of these elements as quality signals and for assistance in determining how to index a page.
They're all pretty easy to use, so I'm minded to include some of these elements into my CMS.
Excellent thread P1R - thank you for putting so much time into posting it all up. Great read.