Oh, cool. I didn't think to check the mainstream news :) I sort of assume that's the case -- I think most important people or large organisations have someone to handle the twitter (although I understand @sweden is just a random Swedish resident picked anew each week :)).
The tick in a blue circle is supposed to mean Twitter have verified his identity, too. Although I suppose there might be scope for a well-chosen background image...
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Although you're right, it can be hacked :)