They wouldn't have to prove anything with messaging like his if their search engine was really bigger than we think: they would post search profits that could come even a few miles close to Google. Let's take a look:
Totally true. Nearly all non techies I know use the address bar as a search bar, and once they reach Google in some way, they type the desired site name (not the URL) and click the first result in the list, which hopefully is what they wanted. I find this frustrating, but stopped any attempt to educate them to a correct use of browsers and search engines because there is simply no hope.
Great to hear it. Now only if they made a light weight homepage. Ditch the photo or lazy load it. And there is another problem: the homepage is mostly black. If I hit search it changes to an all white page. That really hurts my eyes.
These numbers are a bit murky. Any website owner looking at real numbers sees way, way less from Bing. Perhaps comparing true search apples to apples would help.
Even if you switch over to Google for the browser default, you still get Bing on the Windows Start menu, Cortana, etc.
The settings and options are a labyrinth specifically designed to keep a normal person from getting rid of it.