King's Vision Fulfilled

Today is Martin Luther King Day in the United States. It is somehow fitting that the inauguration of the nation's first African-American President takes place a day after. I cannot help but wonder whether a recent CNN poll showing that 2/3 of African-Americans feel that King's vision has been fulfilled and the Obama's rise to the presidency are not somehow related. According to CNN:

The poll found 69 percent of blacks said King's vision has been fulfilled in the more than 45 years since his 1963 "I have a dream" speech -- roughly double the 34 percent who agreed with that assessment in a similar poll taken last March. But whites remain less optimistic, the survey found.

Thus, in one year the number of African-Americans who feel King's dreams have been achieved has doubled! Can the election of one man really have changed so many minds? Or is this just a case of people being swept away by the symbolic significance of what we will see tomorrow?