She did retract her statement: 
“In a case of talk-show Interruptus, I misspoke on the Bill Maher show recently, and apologize for what’s been misinterpreted as implying young women aren’t serious in their politics,” she said in a post on Facebook. “Whether they gravitate to Bernie or Hillary, young women are activist and feminist in greater numbers than ever before.”

Still though. Massively disappointing. First John Cleese, now Steinem. Are all my heroes just going senile?