And even that's unusually good -- except for the tiny percentage of blockbusters and citation classics, most published research papers and theses are never read by anyone except for the authors and reviewers/committee members (if even the latter).

I have made a stab at collecting some citations on citations in one of my footnotes: http://www.gwern.net/Culture%20is%20not%20about%20esthetics#fn48 If anyone wants to suggest more...