* Some spammy links slip thru-- these are dumb sites with lot of stuffed keywords and zero actual content. I dont get these with Google. I've usually seen these when searching for questions related to email list providers, like Aweber or Activecampaign
* Last year, I started getting random porn results for harmless queries, like "Monster videogame 2010". Again, didnt get these on Google.
For these reasons, Im hesitant to recommend DDG to non-technical users.
Why I stick with DDG-- I like to search in private windows, and Google harasses you everytime to accept their terms and conditions. On my iPhone, if I have 10 tabs open, I'll have to do this 10 times. DDG saves me a lot of this hassle.
For me, the privacy is a bonus, but like other commenters have said, there is no way to verify these claims.