Can advertising foist an inferior product on the consumer? Bitter experience has taught me that it cannot. On those rare occasions when I have advertised products which consumer tests have found inferior to other products in the same field, the results have been disastrous.
David OgilvyThe general advertisers and their agencies know almost nothing for sure, because they cannot measure the results of their advertising. They worship at the altar of creativity, which really means 'originality': The most dangerous word in the lexicon of advertising
David Ogilvy...consumers do not buy one brand of soap, or coffee, or detergent. They have a repertory of four or five brands, and move from one to another. They almost never buy a brand which has not been admitted to their repertory during its first year on the market.
David Ogilvy