I Want To Discover Information, Not Search Collections
It is true that if I am in my local public library branch, or I am an undergraduate with a deadline, I go into the library and say "What have you got ?" But if I am trying to find, say, research that links stomach ulcers with Helicobacter pylori, I absolutely do not want to be limited to my library's current physical holdings and online subscriptions.
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Similarly, at Bielefeld last week, Anurag Acharya from Google made a strong case for the wonders of Google Scholar, and to some extent made the case that many researchers want to discover 'everything' (Google Scholar) before they go on find out what is in their library. Yet he made this case at a technical and product level, and I think missed an opportunity to take a "librarians must serve readers" line, making clear that many librarians, and systems, and services are not meeting the needs of researchers in this way.
At the moment we have a range of inadequate services to 'discover everything' (journal citation services are not bad, and of course Amazon is the premier bibliographic source for monographs), and librarians should be welcoming Google Scholar in principle (whilst continuing to challenge particular facets of the system).