We've been reusing the same survey on multiple occasions. Previous users who had submitted the survey showed that some of the open text fields were pre-populated with their answer when filling out the survey again. Is this the case with all surveys?
If there is a login or registration component to your survey and the option for the survey to be taken more than once is selected, then constituent registration fields such as Name, Email Address, etc. are automatically populated if the user is logged in. If the user clicks on the Reset Answers button, the text field answers should clear out but leave the remaining constituent info (name, email, etc) intact.