For the poor folks of Joplin, Missouri, their world has already ended, so for them the preacher was right. The world's Press was only picking up on one American preacher, Harold Camping, and his doomsday prophesying. America regularly throws up these preachers and they have all been wrong so far, but they get their hour in the media spotlight, I suppose. Preacher Camping should count himself lucky that he can still go out camping.
But in mark 13:32 it appears to suggest that christ himself does not know the day or hour of his own return, but the father only. But that can't be true cus christ is in the flesh :) christ says " I and my father are one." (jn. 10:30)