This is an ongoing problem that's been flying under the radar for a long time. The issues raised here probably don't affect people in the US, but there are loads of other router-related problems that due.
Well, that's the point of the article -- many routers in the U.S. have similar issues. If you have DSL service, the phone company often gives you a combo modem-router. If you have cable broadband, you usually supply your own stand-alone router while the ISP provides the modem, but most people will buy the cheapest router they can find. Neither scenario is a guarantee of much safety.
Do you have a link to RouterCheck so that others reading this can use it?