By what metric? For around a year now I use primarily DDG and I often find much better results, for both work/programming-related stuff as well as day to day stuff(assuming I enabled search in context of a country). They also added a lot of utilities I often used in google like currency converters, calculator, date stuff, I don't know what's the last time I had to switch to google for anything really.
(but don't know about objective metrics)
Granted, my metric of “good” is an unquantified and very subjective but to me both Bing and DuckDuckGo outperform google search.
It may just be that i've "gotten used" to using DDG, but i generally think it's better than Google at this point in time.
The only winning point (in my books) for Google goes to Shopping.
But recently DDG has gotten better with this kind of searches. I don't really need Google anymore.