To Robert Siciliano McAfee, the figure recorded for the study UK should be revised upwards. According to him, at least 74% of users would use the same password to access all of their online services. And the worst part is that these passwords are easily broken using a "dictionary attack".
http://www.developpez.com/actu/55153/Comment-procedez-vous-pour-creer-un-mot-de-passe-fort-et-facile-a-retenir-McAfee-propose-des-conseils-pour-sa-journee-du-mot-de-passe/