"Of all channels available to those organizations that market products or services or solicit donations, telemarketing remains the most effective direct marketing medium in getting people to respond. For the past three years the U.S. Direct Marketing Association (DMA) has conducted a study on marketing response rates. All three years the study has found that outbound telemarketing had both the best response rate, and the best return on marketing investment. In terms of sales results, outbound telemarketing appears to be the most effective method of getting people to respond to marketing pitches."

Quotation from Canadian Marketing Association - June 6, 2006.