I have been a happy DDG user for more than two years and it's one of the best things I have done in a while. It works well, and it's great for productivity. So, that Google does not take it extra easy on them is not surprising. However, as Google matures, they will realize they need an AMD to their Intel. Something that poses little business threat, yet diffuses the antitrust threat. ... Watch.
I set DDG as my default search in Firefox; the results were abysmal. It felt like being transported back to altavista.digital.com, wading through middling irrelevant links searching for info. I got fed up with having to put !g into every query to get a good result, I ended up switching to DuckDuckGoog instead (and this is my current search provider).
The web community (that is, all of us) really, really needs an alternative to Google. I don't care whether you love or hate them. We desperately need an alternative.