The fact that Norway, followed by Denmark, has the highest rate of strtups in the world, according to the article, would seem to argue against the "one swallow" theory, and indicate full summer.
And it is not reasonable to assume that his countrymen can't be bothered when they are the most prolific in the world.
Norway is a nice place and the culture and beliefs of the people mean that they have decided as a country to opt for a high social safety net and associated high taxes.
But trying to extract a hypothesis that somehow high taxes and social safety nets are somehow good for starting up a business is, well, stretching it somewhat.
Perhaps one of the reasons this guy found success is that so many of his countrymen can't be bothered because the extra effort isn't worth it. He clearly is motivated by more than money, so high taxation doesn't affect him much. So you could say Norways taxation system encourages people to build family style companies, and only suits entrepreneurs who aren't money-driven. That's an equally valid conclusion to draw from the article if you ask me.