There is one picture [0] where the board isn't set properly (the square at the the bottom right corner is black instead of white), so I suppose they some of them are not too strong.
[0] http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/li...
[0] http://ichef.bbci.co.uk/wwfeatures/wm/live/624_351/images/li...
It might be confusing to people very used to the "traditional" rotation, but maybe breaking free of it is a good mental exercise? ;)