Google Meets Publishers and Librarians, By Hawkins, Donald T, Information Today (Sept 2009)
This was a "report from the field" from an event taht included publishers, librarians, and analysts.
Of interest: A list of Google's weaknesses - especially for academic use of Google Scholar - but applies generally
+ Google has no metadata to allow filtering of search results
+ Search algorithms can be artifically affected by SEO
+ Information on what is actually being searched is not available (Google Scholar)
+ Content retrieved in a Google search may be difficult to access (Google Scholar)