Increased Support for Gay Marriage

A new CBS/New York Times poll shows a major increase in support for gay marriage in just one month. In this poll, 42% supported full legalization of same sex marriage -- up from only 33% in March. Only 28% want no legal recognition of same sex couples. Why the 9% spike in a month? Could the recent state legalizations have convinced some people that the tide is turning and they should get on-board?