Earlier quoted context omitted.
Touche. Although, a BTC exchange + BTC merchant together have to only beat out on Paypal's charges. BTC seems to be stable enough that Paypal's 2.9% charge per transaction makes BTC a useful competitor. That said, now you have to trust both the BTC exchange and Merchant. But that is a bit easier if you can put up with the downsides to BTC (no chargebacks, etc. etc.)
In a common scenario where the customer pays 1% to Coinbase and the merchant pays 2.6% to BitPay, Bitcoin comes out worse than Paypal or credit cards.
In another common scenario where a Senator named Lieberman makes a press release accusing Wikileaks of criminal activity, and other payment processors simply refuse to conduct transactions for you, Bitcoin also comes out ahead.