H.M.  Actually, it wasn't a typo.  Here's a quotation for you:   "In a story about drugs in sport – Exposure risks new batch of cheats, page 33, Sport, October 24 – we wrote: "As the consummate American huckster PT Barnum once said: Nobody ever went broke overestimating the intelligence of the American public." What HL Mencken said was "Nobody ever went broke underestimating the taste of the American public."

This is a quotation from the "Guardian" referencing the statement which you post above.  In the end, both statements are, I think, accurate.  regards, Gary