Apparently, she's spinning clockwise all the time for some, counter-clockwise for other. Some see both but cannot control the direction, and others can switch at will.
(I can switch if I focus, and it feels bizarre.)
The article that appeared in Australia's Herald Sun on October 9, 2007 says most of us see only counter-clockwise (i.e. left-brained), but when I re-tweeted this article there were many who said they could only see clockwise turn no matter how hard they try.