http://www.businessinsider.com/google-search-share-below-75-2015-2

QuoteThe US market drop is a stark reflection of Yahoo's small but notable resurgence, as well as Bing's bold attempts to stay in the game. Together, the search engines are chipping away at Google's 10-year dominance and clawing back percentages.

After switching to DuckDuckGo a while back I make sure none of my browsers defaults to GG anymore. After a while you see that the other SEs aren't as lacking in quality as they were before. However, I wonder if this is just the result of people being given a default that they never change, or if it's people actively making a decision to use other SEs. I'm guessing it's more of the former...

I suspect you are right, but that is telling in a way too.  To me it means that google, yahoo and bing are close enough that a lot of people will not miss the difference.

QuoteAfter a while

yes, with you thre,  it does take some getting used to switching. There are a few surprises to of things that are lacking. But Bing is catching up I think.