hmm...interesting stats....IS has always been the popular one and every major stock agency are bad mouthing istock bcos of her cheap photos and the darling of stock sites so its not surprising that she has emerged tops. She has been in the news so often that its a matter of time people became aware of her existence. I knew about istock first before the rest of the stats sites i think
These would be the standard statistics, it may only be a reflective figure and not the real one cos not everyone has Alexa install on their computer and Alexa i heard only track those people who have it. But still its better than no stats. Thats the way it is with stats co, evey AC nel etc etc