World population at 7 billion

Back in October, the United Nations declared that the world population had hit 7 billion. The U.S. Census Bureau, however, believes differently. Here are the World and U.S. population clocks from a moment ago:

So, as far as the Census is concerned, we'll hit 7 billion tonight sometime.

That the Census didn't update its estimates to match the U.N.'s suggests they're confident of their more conservative model.