But I honestly believe that for every vote Obama gains for giving a fluffy speech, he also loses one. I can't watch an Obama speech without cringing, because I know it's just all bullsh**t. Independents see that. Republicans certainly do.
I wouldn't assume that about Independents...
Remember Bill Clinton and George W. Bush having this effect? They had the same effect on the other sides. Clinton in particular drove Republicans crazy because he was so extraordinarily charismatic and yet could obviously flip it on and off like a switch. George W. Bush's "jes folks" demeanor turned off Dems. But Clinton in particular won over a majority of voters and Bush, well, you could say he failed to alienate enough independents as he did Dems to give Kerry an opening.