This is an interesting perspective on the drivers behind behavioural change in the way people use Google. It raises and interesting point about how work to improve SEO is actually eroding trust in the results returned. It makes sense really that what was once a accurate and honest set of results is now potentially skewed by those that are stacking the odds in their favour.
Also, with the rise in social networks people can now easily tap into a trusted and known source to find businesses etc. Of course the beauty of these networks is that you no longer need to actively seek the information you need. It comes to you.
http://www.alexjcampbell.com/post/175271559/stark-realisation-i-no-longer-depend-on-google-to-find

[...] couple of weeks ago I referred to Alex Campbell’s post on the possible drivers behind behavioural changes in the way people use Google search. Personally, my greatest frustration with Google is trying to find up to date information and being [...]