This rumor has been thrown out numerous times in numerous media outlets, but I've found it to not hold much water. I do suspect that Paulson used it as a fear threat for TARP passage.
you've got the whole thing backwards...they broke the buck at 97 cents...which means people in money market funds could only get 97 cents back for every dollar...which is why there was a run on money market accounts...and since money markets fund corporate paper, the economy came to a screeching halt...which is why Paulson went to Congress.
there was no conspiracy among media outlets.