In the moment when Southwest airlines paid for it is an advertising piece indeed. And to remove any shadow of doubt if you can't see a similar image when you search for American Airlines or Jetblue then it is clear that Google is favouring results against other companies in the same industry.
My point is if I search for jetblue and I dont get the southwest image that's not a banner ad, at least not in the traditional sense. If fact if you search for southwest without being in this test group you'll see a southwest image on the right side. Is that a banner ad, if so these images are old news.
Now if I were to search for plane tickets and get the southwest image, that's a banner ad.
Under that razor... if you search for southwest airlines and between the results you get a Adwords of Southwest, then that won't be an ad because is in the result page of the same thing I was searching?
As a user, sure why not? Why does it matter whether the link you want is within the ad words box or under it? If you're searching for southwest airlines you obviously want the southwest homepage. Now southwest probably sees it different since they're paying for ad words but that's a different conversation
