It could be people are reading to much into google's recent changes. Google has been a relitively simplistic SE for years. I see nothing to suggest a change in workings, so they have targeted some competitive keywords, there track record shows it probably some half baked simple filter. It mostly bluff, thats why they keep asking us (the whole spectrum, seo's to web user's) what we think. They dont know if its worked well, therefore they need to know what we think as much as we want to know what they are thinking. ONLY DIFFERENCE WE OFTEN TELL THEM.