I switched today. I actually find the results to be better in my case. For example, I don't have to groan every time I search for something web related and get w3schools as the first result.
I'm seeing w3schools more often on DDG. :/ For example the query [css font-face] returns them as the #1 result on both DDG and Google. But Google at least has the Mozilla developer network as the #2 result, while DDG's #2 result is... another w3schools page. As are results #4 and #7. You have to go down to #11 to get the Mozilla result.
Overall I find DDG good enough most of the time, though. The main thing Google still seems to do better is heuristically figuring out vague queries or queries for not quite the right term, as well as word-sense disambiguation.
Overall I find DDG good enough most of the time, though. The main thing Google still seems to do better is heuristically figuring out vague queries or queries for not quite the right term, as well as word-sense disambiguation.