Tom,
that does not appear to be the case. If you had an all cash account you are still looking at a 72% distribution. Also everything I read is that they can borrow from customer accounts, but they are suppose to replace the borrowed money with collateral such as government securities that are very stable with the agreement of the customer. I know of no gov't securities that were put up for borrowed money, if in fact it was even borrowed as opposed to illegally obtained. Bottom line is that money is suppose to be segragated unless replaced by high quality collateral like gov't treasures.
Look at the customers that have documentation that they have gold and silver bars. That physical commodity is still there. It was not trucked off and is missing, but the Trustee is looking to put that in a pool for the creditors.