Observation and thoughts about Google and Google Scholar

We realize that something called "deep web" when exploring more about google and google scholar:
http://www.lib.berkeley.edu/TeachingLib/Guides/Internet/InvisibleWeb.html
Deep web
http://www.internettutorials.net/deepweb.html

Google Scholar ( http://scholar.google.com/) claims that indexes scholarly literature, such as peer-reviewed papers, theses, preprints and technical reports from academic publishers, professional societies, preprint repositories,
universities and open access publications across the web.

From the description of HKUST Library's newsletter, in addition to indexing their content, Google Scholar analyzes their citation pattern and calculates how often a title is being cited by others in its archive.
Search results are ranked by relevancy, which takes into account th
appearance of the search terms, the article's author(s), the publication
source and the number of times a title has been cited. Each title in the
result list has a "Cited by X (a number)" link, and clicking on this link
will show you all the citing references. Though full-text viewing is
limited to open access publications (unless the Library has a subscription
for the content), abstracts are available for most documents (except thoseoffline documents that are referenced in citations only).
Source
http://library.ust.hk/info/notes/notes56.html

Some interesting information is as follows:
Use Google Scholar to find articles from a wide variety of academic
publishers, professional societies, preprint repositories and
universities, as well as scholarly articles available across the web.
Wleklinski, J. M. (2005). Studying Google Scholar: Wall to wall
coverage? Online (Weston, Conn.), 29, 22-6.
Jacso, P. (2005). Google Scholar: The pros and the cons. Online
Information Review, 29(2), 208-14.


Fantastic 4