I know that the words of wisdom when I spent more time outdoors was 1 minute of boil for every 1,000 feet, or 10 minutes. Here is the US, and at normal elevations (CO being an exception), a rolling boil for a minute or so would suffice. On a stove in a home, the time isnt really an issue, as you dont have a limited fuel supply (barring any other services being cut off, that is), so, if it boils for 2 minutes, or 10 minutes, will not really matter, other than boiling off the water. Hiking/camping, yes, I would adhere more closely to the 1 minute per 1000 ft rule.

Horus-I think that the message was intended to avoid lawsuits-hence, making a blatantly obvious message on the TV to avoid drinking the boiling water. I honestly think that was their intent. Maybe not that we are all idiots (I wont get into politics here), but more likely just to avoid the likely lawsuits that would follow.