FL is probably an outlier, but who knows because seniors may have been turned off by Ryan (they pay attention to the AARP), and an Obama 9 point lead in FL is most likely built on seniors turning their back on Romney.
Ohio is also a very elderly state. I believe that this story of seniors switching is the big news and game-changer of the last week. I predict a big win in Florida (53+%) and without Florida or Ohio Romney hasn't a chance.
It took a while to show up in the polls, but it turns out as unappealing as Romney is personally, it was the Ryan choice which was the straw that broke the camel's back of (part of) his natural base support.