American Express is considered to be the gold standard of credit card companies. They have the pickiest policies as far as who they issue credit cards... they only accept high credit scores with few or no deliquencies. They are widely acknowledged in the credit card industry of having the highest quality card holders.
So basically if they turn out to have a lot of deliquencies, then look out below. Companies that issue subprime credit cards to a lot of deadbeats like capital one will get obliterated.