I doubt it too, but it was one of the theories thrown around at the time.
I agree, they are in Syria and/or buried real deep somewhere in Iraq.
I'm personally of the opinion that we HAVE found some there, and have kept it under wraps for military or strategic reasons that are beyond me at this point. I have a relative who was over there and said that they were found... and back home, we couldn't understand why the administration was not refuting the claims that none existed. Maybe it's because our intelligence knew that once the lie was exposed, the enemy would be more prone to use them.