According to the Gartner survey of 5,000 online adults in August 2006, an estimated 24.4 million Americans have clicked on a phishing e-mail in 2006, up from approximately 11.9 million in 2005, while 3.5 million have given sensitive information to the phishers, up from 1.9 million adults last year.

Recent browser upgrades (such as with Microsoft's Internet Explorer and Mozilla's Firefox) will try and flag known phishing attack sites to consumers, but Gartner analysts said many attacks could still slip by.