Personal experience: While I have DuckDuckGo as the default search engine on my notebook, I end up taking multiple-word queries to Google most of the time because the results are much better there.
In fact, DuckDuckGo is only better for one-word queries for me because of its promoted results (e.g. when I'm searching for the name of an OSS project and it highlights the official website at the top of the results page).
In fact, DuckDuckGo is only better for one-word queries for me because of its promoted results (e.g. when I'm searching for the name of an OSS project and it highlights the official website at the top of the results page).