The staff post earlier today on the methodology and internals of the Des Moines Register's Iowa Poll led me to this rather startling discovery about the poll's picture of the demographics of likely Democratic caucus-goers: Only 2 percent are under the age of 25, while 51 percent are over the age of 55.

Two percent under 25? Is that possible? Does the poll assume that Caucus Night will coincide with big episodes of Heroes or Grey's Anatomy?

Given these numbers, the really amazing thing about the Iowa Poll results is that Barack Obama is still within striking distance of HRC. And to flip the issue around, even if the percentage of Caucus-goers under 25 turns out to be twice as high as the Iowa Poll suggests, all the media stories about Obama's robust campus-based support in Iowa have been apparently been goosing a ghost. You don't count if you don't vote.