nomis5 - 7:39 pm on Jun 6, 2013 (gmt 0)
Fascinating that it has taken so long for the OP's question to be asked.
The decision whether an article is an advertorial or not is, in many cases, purely in the eye of the beholder. And the beholder in this case is G. And who knows how their algo and / or employees will determine what is or isn't an advetorial. Not me, and I bet not you.
It's another "unknown" which they can call upon as and when G think fit and how G think fit.
More importantly from the way I look at it is WHY G have made this announcement. If, well I do in several cases, have articles about a specific product, green widgets, which links to the green widget site than I assume that will be classed as an advetorial.
Whatever the definition of the word, the aim behind my article is to highlight a product which I believe my readers will benefit from and give the reasons why. Why should G object to that? Why do I now need to go round and place nofollows on those links. It's absurd that G can even suggest I waste my time doing that. But that is what they are saying.