I didn't see his victory speech this time, but I did see his victory speech in the primaries:
"...I am absolutely certain that generations from now, we will be able to look back and tell our children that this was the moment when we began to provide care for the sick and good jobs to the jobless; this was the moment when the rise of the oceans began to slow and our planet began to heal..."
which at the very least suggests "humility" isn't necessarily deeply ingrained.
He was still trying to get elected at that point in time and it's hard to drum up support when you say "aww shucks" (?sp) when your given the spot light.