I too have heard about Bing's growth, but how much of that is NOT because of it being default for windows 10 and Cortana searches? I think default-bing searches make up >90% of all bing searches (as opposed to going to bing.com or setting it as the default on your browser), but I'd love to see the data on that.

Google became a verb which demonstrates a solid position. I was interviewing at Yahoo and was given a project problem. The interview said "Feel free to Google stuff to build the project", I joked back "Don't you mean Yahoo it?" He laughed and said "No, you can use Google. We all use Google here, it's fine."

I think they're pretty dominant