It's good enough for me unless someone can show that the sites in the results are owned by the same company.
Edit: The articles seem to be completely identical. That's a lot of recycling!
Edit: The articles seem to be completely identical. That's a lot of recycling!
Of course there are also less reputable methods like just scraping articles from your competition.
Either way, it doesn't really _prove_ anything regarding it being a seeded PR piece, though my gut also tells me that it's likely.