Is Atheism the Default position?

In this episode, blogger Sacerdotus takes on the claim that atheism is the default position at birth/conception.  Atheists often use this phrase to claim that we are all atheists until we are indoctrinated with a particular religion and concept of a deity.  Is this true?  Sacerdotus answers this question and shows how the idea is fallacious.  The claim comes from philosopher Antony Flew who was an atheist and became a theist after he found evidence of God in the sciences and philosophy.  Reason brought him to God it seems.