Tom Kludt compares "Obama’s leads in live polls compared to the robo-polls since the end of the DNC last month":
Charles Franklin, the director of the Marquette University Law School Poll and co-founder of Pollster.com, explained that surveys conducted by live callers remain the preferred method because they are able to reach a more accurate sample of voters.
Part of that, he said, is because unlike robo-polls they are allowed to call cell phones as well as landlines. (Robo-polls are legally prohibited from calling cell phones.) Another reason is that voters are more likely to answer questions from a real person than a pre-programmed recording. That means live polls will sample not just the enthusiastic voters, but also some who are in the middle of the road.
The Dish 
