According to results from the “2013 Edelman Trust Barometer,” an online survey of 26,000 general population respondents from 26 countries, the answer is more than twice. The study explores how consumers and the public place their trust in corporations of different sizes and form opinion.
The report discovered that 35% of those identified as “the informed public” need to hear company information 3 times to believe it and 29% need to hear it 4-5 times.
In the US, 86% of "informed" consumers basically trust small businesses, while only 55% place their trust in big businesses.