We've made a lot of relevancy and speed improvements lately. If you have any specifics, we'd love to hear them. A good way is to try it for a week, collect all the ones that suck and send them to https://duckduckgo.com/feedback.html -- we're listening!
Interesting, what makes you say that DDG's results suck? I've been using it as my primary search engine for a few weeks now and aside from it not including a map in results unless you give it a very explicit address, I've found it no worse than Google's results.
ghostfish's message is now gray, so I guess he has been downvoted. Can anyone explain why?
My experience with DDG has been very similar to the one cited by aw3c2: I used it as my primary search engine for a couple of months, and eventually found myself always using !g, so I switched back to google.
On programming searches DDG goes better for me (than Google) because it uses the English data. Google insists on using Spanish data even though I disallow results in other languages than English or Catalan.
For other searches, mostly local information but if it's something recent too, Google goes better. So I use DDG at work, and Google at home.