wheel - 1:24 pm on May 10, 2010 (gmt 0)
I give the results a 'pretty darn good' in my niche. In fact they seem to be able to tell a real 'authority' site far better than Google does these days. No paid links or networks filling the top top page.
Let me rephrase that to be more specific. For the few searches I did in my niche, their results were noticeably better than Google.
And no cached links!
I'd be quite happy if that was the SE of choice.