I don't know.
The longer answer:
Something I always wondered about Jimmy Wales' Wikia project was how the search engine was going to establish an index of billions of web pages. Even assuming the legitimacy of user-driven search, which is itself a stretch, the technology and capital required to overpower Google in search would likely evade the overmatched Wikia.
Cuil, on the other hand, promises the ability to index the internet's hundreds of billions of web pages better than Google. Not only do they intend to index better than Google--and even claim they already have an index three times as large as the search giant--but they intend to do it with far less financial resources.
Apparently, my major argument against Wikia doesn't seem to apply to Cuil. What does make me skeptical of the new search engine is the actual product that was lauched today. If Cuil is crawling roughly 125 billion web pages, why are there some fairly substantial pages absent from search results? One decent example that demonstrates my point (and possibly my partiality) is the absense of City Dictionary from the search results. Google has already crawled and indexed the website a number of times since it went live in April. (Google currently lists nearly 10,000 pages for City Dictionary's domain in its search results.) Google has also followed several links from other websites to City Dictionary, each time placing greater importance on the new website. As a result, City Dictionary has the #2 spot in Google for 'City Dictionary' and the #1 spot for "City Dictionary" with the quotation marks.
Q: Where does City Dictionary appear in Cuil's search results?Even when I put in 'City Dictionary local flavor,' which makes an obvious reference to the tagline 'The Dictionary with Local Flavor' that appears in the 'title' tag for the homepage, the results suddenly go from somewhat relevant to completely off the radar. (Top search results include pages from lawyer.com, as well as others looking to sell "cheep airline ticket.") Bottom line, I can't find any of City Dictionary's thousands of pages in Cuil.
A: Nowhere.
Why is this important? I don't have any delusions of grandeur for a site that is only a few months old (it's still not so bad if I do say so), but City Dicitonary's complete exclusion points to a very daunting problem for Cuil. If the new search engine already claims to have a larger index, that index still does not seem to have very timely content. City Dictionary has been in three different newspapers in the past few weeks. Google finds timely content because it is constantly crawling the most popular news sources. Since a great part of search is based on time-sensitive issues, I can't help but to question the quality of a search engine that can't follow links from newspaper websites in a timely fashion.
So, does Cuil really have an indexing advantage over Google? Well, not necessarily. Google no longer publishes the size of its index, so Cuil's claims to be three times larger than Google are suspect at best. Plus, very little is known of Cuil's indexing techniques; so, the young engine's ability to (re-)crawl billions of web pages on par with the incumbent search giant is questionable.
It's not just content; it's intent. Search is still an intent-based medium. Reducing the influence of links to search engine results o take away the ultimate popularity metric on the internet. Are web pages that have backlinks from several blogs and trusted news sources of higher quality than web pages without such links? Generally speaking, yes. Of course Google will continue to sort search results by content relevancy, but the democratic system of linking is still paramount until Cuil can come up with something more compelling (which may exist but has not yet been articulated). Cuil must have an answer for the very powerful Page Rank system. Otherwise its 125 billion collection of web pages is for naught. (By 'naught' I mean being sold to Microsoft for about $500 million.)
Will Cuil end up creating great search results from its gargantuan index? We'll have to see what happens in the years to come, but for now it's not that cool.