Funnily enough I just got an example of this from a friend who is trying DDG this week.
Her example query that did better on Google than DDG:
> why did robinhood go down feb 29 2020
What I would search for the same question that does better on DDG:
> robinhood down
She's 24 and I'm 29 so it's possible that difference is real, people who are younger may be tailoring searches in a way that benefits Google (in which case they may not benefit as much from DDG or really would have to change behavior).
Her example query that did better on Google than DDG:
> why did robinhood go down feb 29 2020
What I would search for the same question that does better on DDG:
> robinhood down
She's 24 and I'm 29 so it's possible that difference is real, people who are younger may be tailoring searches in a way that benefits Google (in which case they may not benefit as much from DDG or really would have to change behavior).