The post discusses how often certain ‘areas’ of the page, such as footers, switch-out links to better detect paid linking. Many sites have relegated paid linking to footers and other segments of the page that seem natural.
The ambiguity of whether or not a page’s content should be updated on a regular basis is touched on, but is left just as ambiguous as ever. I think it’s common sense: If you have a news page, it should change quite frequently. If you have a statistics page, it should change as often as stats are measured. If you have a resource/reference page, then it should be updated ONLY as often as authoritative information changes.
I’m, personally, delighted to see that ‘partial indexing of pages’ is being given serious focus, if only briefly.
We all know, and have for some time, that the more inter-related terms a page ranks well for gives it better ranking for these terms, across-the-board.
I do, however, find that what is discussed about ranking ceiling, traffic throttling, and the yo-yo effect has some solid basis – as opposed to just giving SERP watchers something to complain about.