It is for this year, but not in 2013 and thereafter. See this article.
http://taxes.about.com/b/2012/02/21/social-security-tax-rate-to-remain-at-4-2-for-all-of-2012.htm
“”It is for this year, but not in 2013 and thereafter. See this article.””
That was always the rate before the tax cut holiday so it can hardly be called an increase. I would say most people were used to paying the combined rate of 7.65% before that.