2008: Idealistic, before president statements.
2011: Oh, shit. This is a tough job statements.
or
2008: This is the government of the people, for the people, by the people that we were all taught about in school! Yes, we can!
2011: Or not. Apparently we can't. Smile, Mr. President. Keep smiling...
I'm not surprised. No one ends up in the White House prepared for the role except perhaps a successful career senator. Campaign rhetoric - no matter how earnestly intended - often vanishes on contact with that reality. It is disappointing, though. Honesty in politics would be so.... weird.
Obama's peace prize was for being the first person of color this "diverse", "melting pot" and "equal" nation elected president. A descendant of what was once a slave race here finally became the nation's leader. He pulled that off and the world noticed. Long time coming, in their minds: "Finally, the US has elected a leader that reflects their mythology about themselves. They just might be growing up." Ultimately this is primarily what he will be remembered for and the world put its support of this moment into history by giving him the peace prize. He didn't really do that much other than that. It was really a peace prize for convincing the US to pull its head out of its ass.