I seriously believe that if we now found 500 missiles buried in the sand and 800 canisters of chemical weapons and 20 mobile bio-terror labs, it would not make a dent in the public's impression that no WMDs were found. The press would somehow diminish the findings to the point that the public would remain generally unaware what had been found. And the "no WMDs/ Bush lied" storyline would pass into history as fact.
Sadly, there is truth to what you say.
True since they refuse to acknowledge the small amounts that have been found there, why would large quantities found make any difference.