Found out about this post via Twitter! Dean Giustini, the health librarian from UBC, Vancouver, posted in his blog The Search Principle :
"Use pre-search tools to orient yourself, to browse, ask questions and get acquainted with topics. Who are the leading authors in a given field? What articles are seminal? Pre-search as a concept is also applicable to Wikipedia. Think of mother Google this way (i.e. presearch) as well."
Dean is an expert on Google Scholar so I think this short post is worth a glance.