The inflated numbers can't just reflect voters who have moved, because the average voting registration level nationwide is only 70%. The vast majority of voters over the 70% level are not voting because they want to, they are voting because someone is getting them to cast a vote, one way or another. Those 31 counties are most likely the largest counties in Ohio, representing a majority of Ohio voters. This means the number of votes cast above the 70% typical voter registration level easily tops 100,000, the margin Obama won Ohio by.
More @ Townhall