Earlier quoted context omitted.
That's because cuil was building a search engine from scratch rather than relying on bing's/yahoo's index to do the underlying scoring. Maybe they shouldn't have started from scratch, but they were certainly tackling a much harder problem (maybe not the right one.) I've heard through the grapevine that they were able to index and serve 100 billion documents on 100 machines, which is a pretty impressive technical acco…
"That's because cuil was building a search engine from scratch rather than relying on bing's/yahoo's index to do the underlying scoring." I've heard this in other discussions of DuckDuckGo here, and I don't understand why bing/yahoo allow a potential competitor free access to data that is so important to their search businesses. What's in it for Yahoo/Microsoft? Or is DDG paying for the privilege?
I don't think the ordering of the results is Google's competitive advantage anymore it's branding and habit.