It comes up VERY times DuckDuckGo is mentioned, yet there's not a single source that suggests that DuckDuckGo is just a frontend for Bing.
It's clear that DuckDuckGo used Bing for some result, but not to what extend. Are all result Bing? Does Bing only provide results when DuckDuckGos own crawler fails? Are the results mixed? I very much get the impression that results are mixed, but that's not completely clear either.
I should check server logs at work, I don't run my own web servers, so I can't claim to have seen it.
> In fact, DuckDuckGo gets its results from over four hundred sources. These include hundreds of vertical sources delivering niche Instant Answers, DuckDuckBot (our crawler) and crowd-sourced sites (like Wikipedia, stored in our answer indexes). We also of course have more traditional links in the search results, which we also source from a variety of partners, including Oath (formerly Yahoo) and Bing.
Why should I care about where DDG gets its search results from? They promise a good web search and don't deliver.