Let me get this straight: you are stating that empirically the new sample is the bad one and not the 4 day old sample rolling off. Wow, where did you study mathematics?
No. The thread title said "Bush 54-Kerry 43" for the ABC-WP poll, which is currently 51/46. A shift like that is impossible through either a bad sample falling off or a good sample coming on.
And you can draw a distinction, because if the bad sample were there we'd have noticed it three days ago when it first made a splash. This poll has been hovering at close numbers in the high 40s for at least a week or more, only starting to diverge the last couple of days. For Bush to go up to 54/43 we'd need to have a sample showing 60% Bush/37% Kerry today. That's why I suspect today's poll rumor was just a rumor, and that's why our host pulled the thread.
Today's poll will probably continue to show Bush with a nice lead, perhaps with a small improvement.