I would file this under the best lines I have read today category except that the line comes from letters by G. Stigler to M. Friedman:
"It may merely be prejudice, but I'm inclined to write him [Samuelson] off as an economist."
"Of the many speakers only one was terrible -- shallow and pretentious, Joe Schumpeter."
I got this from the book review of the new book Making Chicago Price Theory: Friedman-Stigler Correspondence, 1945-1957 by Craig Freedman at EH net, read the review here.
Thanks to Peter Klein at Organization and Markets for the pointer.