This fascinating blind tasting of many of Margaret River's finest wines was organised at Cullens winery earlier this year, one of the very few mother-daughter enterprises in the wine world (though Faller in Alsace springs to mind).
It was blind within the four areas into which some Margaret River producers would like to see the region divided, from north to south: Yallingup, Willyabrup (perhaps the most classic Cabernet heartland), Wallcliffe and Karridale. The aim was to see whether there were area differences. See the new World Atlas of Wine for my conclusions! (Well, I've got to use every means available...