I'm not doubting that, but is there a website that checks such things?
Someone actually figure out the silver mining costs by mining company. The avg cost was about $ 23 per troy ounce, but ranges from $ 19 to $ 32 by individual mining companies. Google it, you may find it. Mining companies can still mine below cost because they are suppose to have cash reserves for lulls, but they are having a tough time getting loans from banks and raising capital. If low prices are sustained, these mines must close or cut back mining operations. That will impact supply. You can find the same data on gold.
Speculation is that since so many mining companies are leveraged with equipment loans and such that (one of) Wall Streets objectives is bankrupt the companies and call the loans... gain ownership of the means of production.