Probably true....plus the higher price to pay.
I bought some 1 oz rounds from a private mint a couple of weeks ago. Good price, but I won’t get them for two months. In the meantime, I can trade my paper positions, but only at the spot price minus the spread. Once I get the actual silver, I can sell them at a much higher value. Of course, in a couple of months the discrepancy on COMEX might be corrected.