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When a post is new, the post has links from the home page, page 1 of category/categories, page 1 of the tag page(s) (if applicable), and page 1 of that month's archive pages... And the first page of all category/categories and page 1 of all monthly archives pages are typically linked to from every page on the site because they are sidebar widgets.
Once 10 more posts are made on the site, the post rolls off the home page and loses it's most powerful internal link.
Once 10 more posts are made in that month, the link to the post rolls off of page 1 of that month's archive onto page 2 of the archives. At this point the page loses a lot more link juice because page 2 is typically ONLY linked to from page 1 of the archive where page 1 on the archive is linked to from every page on the site.
Once 10 more posts are made in that category (or categories), the link to the post rolls off the page 1 category page(s) and onto page 2 of the category/categories. Page 2 of the category does not have links from every page on the site, typically only from page 1 of that category. So your post loses even more link juice.
yada yada yada
The holy grail remains truly editorial, natural inbound links given freely from webmasters of other traditional (non-blog) sites which tend to NOT fade over time unless the other site's overall authority fades.
I think the way Google sees this is that most natural links are from the main content area.