Let's look at Ohio as a microcosm of this effect. Live phone interviewing polls are giving Obama a much larger advantage than robocalls.
Let's just look at the most recent polls.
First the automated (meaning no cell phones or live interviews) polls:
Automated (PPP, Gravis, Rasmussen): Obama +1, Tied, Obama +1
Average Obama: +.067
Now the live interview polls:
CBS/Quinnipiac, Fox, SurveyUSA, WSJ/NBC: Obama +5, Obama +3, Obama +3, Obama +6
Average: Obama + 4.25
It is painfully obvious that the Robo pollsters (which are cheaper to run) are missing a larger # of Obama leaners,