A new survey shows that half of American consumers would consider walking out of a store without making a purchase if their debit cards were not accepted. Furthermore, nearly two-thirds of respondents said their feelings toward a store would be negatively impacted if a merchant stopped accepting debit cards. The findings come from a new Harris Interactive survey, sponsored by MasterCard, also found that 77% considered debit’s transaction speed and ability to save time at the checkout counter as extremely/very important. More than 80% of adults using debit cards noted convenience and safety to be extremely/very important attributes, as opposed to carrying cash. The survey was conducted in early December with a nationwide sample of 2,465 adults.