Just to continue my echoing of John on this one . . .
Let me repeat that, in my view, the 47% is not a gaffe but rather reveals an actual, and unpopular (with most voters) aspect of Romney’s position and ideology on economic issues. So it makes perfect sense to me that this speech could move voters from Romney to Obama, hence John’s recent poll summary seems very reasonable from my perspective. I think John was right in his inclination to look at the data to address these questions!