This is a Ctools code change, I wanted to see if people agreed. Then I can do it. See this issue where I posted it on Minipanels first to catch up: http://drupal.org/node/1803956

$plugin['strings']['confirmation']['edit'] += array(
    'success' => t('%title has been updated.'),
    'fail' => t('%title could not be updated.'),
  );

(that's line 347 in export-ui.inc)
CTools grabs the field it uses in the title from $this->plugin['export']['key'].