The failure of interested parties to understand this point boggles my mind. There is a solution to bitcoin's volatility, and it's relatively simple. Even if you don't understand the solution, you can certainly understand that payment processors in the space offer guaranteed USD conversion. And even with this guaranteed conversion, it's still significantly cheaper than traditional payment processing methods.
The article did mention "large companies". It's one thing to trust Bitpay to be able to hedge the risk for guaranteeing a price for 10,000 USD worth of BTC, and another if you're talking about millions at a time. Essentially, the payment processor must be significantly bigger than their customers for the customers to have any reasonable trust in their ability to pay up if something goes bad. Failing that, the payment processor must be backed by a serious, established party highly unlikely to default. It's going to be a while before we see that.
Valid point, however, I personally don't think it's going to be more than a few years before there is enough market depth to hedge ten million USD or more per day in transactions without causing any significant volatility. I also think it won't be more than a few years before some seriously established institutions decide to take advantage of bitcoin's relative efficiency.
We'll just have to continue to watch Bitcoin grow into adulthood.
