Well, after 13 days Religulous is about ready to overtake Expelled in total US box office gross, according to the-numbers.com:
Religulous: $7,049,342 in 13 days
Expelled: $7,598,071 in 39 days.
It took 21 days to get to where Religulous is now.
What does this say about all the Doubting Thomases out there versus the Young Earth and I.D. supporters?
Update: it has now surpassed Expelled in gross at $7,622,104 in 16 days.