goodroi - 10:31 am on Jun 6, 2013 (gmt 0)
I would be careful and not assume that Google currently is able to identify advertorials. I think most of their current actions against advertorials are manually done.
Looking back at how they addressed paid links, it was a very long time before they had a functioning filter.
If I was Google I would look at site relevancy. If a site is about political news and has one page about personal vacations, then that is probably a paid ad. Even if it is not an ad, as Google I would question the quality of the off-topic content since it was written by a political news website. If a page falls outside the theme of a website as Google I would devalue it.