Understanding culture

Found in Ethan Zuckerman's post on a "Dialog With/In Islam":

[Sarah Joseph, editor of Emel Magazine, an alternative British Muslim magazine] shows us a campaign for washing powder that was hugely successful in the UK, but went over like a lead balloon with Muslims. It’s a series of three images - a green sock, a washing machine and a white sock. “It didn’t work well in the Arab world, because Arabs lead right to left!” she tells us.

Ya think? What about those versatile enough to read left to right? You don't think there's any symbolism of the green (the color of Islam) disappearing? (Or perhaps it's just a foot issue.)