I agree with woodcojb. I seriously think Biden's charisma should be somewhat higher. Here's an article about him in the LA Times (and I find aricles describing his rallies now and from the primaries to be consistent with this):
"[Biden's] This kind of talk goes over big at a labor union hall in Akron. His
half-hour speech tends to meander, but when he asks how many people
know someone with a house in foreclosure, more than half of the hands
in the room go up. And when he repeats his father's advice about
falling down, gritting his teeth and commanding "Geeet up!" they do,
leaping to their feet in cheers....
"His campaigning style recalls Bill Clinton's; he listens, and people
feel permission to use the few seconds they have to talk about their
shrinking Social Security checks, their stolen pensions, even their
"Later that night, at a rally at the College of Wooster, a liberal arts
school in a conservative county not far from Canton, Biden is happily
posing for pictures when a woman calls out, "I'm the mom of a U.S.
soldier." She is Patty Groom, 47, with a 26-year-old son in the Army
who just left for his second tour in Afghanistan. Her husband is laid
off, her daughter is 9, and the paycheck Groom earns at the steel
bearing plant isn't enough, so she has taken to charging the groceries.
""He said his son is going too," she recounted afterward, sitting down
on the bleachers with tears in her eyes. "He put his forehead on my
forehead and said, 'I promise you with everything in me that I will
bring our troops home.' It was like nobody else was here.""
LATimes: "In-your-face time with Joe Biden"