For many searches, google's results I find are better - a common issue I've found it DDG's results are just too general for quite specific searches - .e.g the top result is teh homepage of a brand when I search for something more specific like "brand something something" (sorry i can't come up with a great example right now).
I still use DDG as I can use the rest of the bang syntax to get to wikipedia et al, and for certain things the results (e.g. code/technical) are clearly superior to googles.
I hope DDG logs all the times I go to DDG, then add in !g, to get some great analytics on when I found the search results lacking!