alt Hacker News> No, that is not how you change search engines.
See it from the perspective of a non-technical user:
1. I install the Yahoo Search app
2. When I want to search I poke the Yahoo icon on my home screen.
Or:
1. I open my browser.
2. I poke Yahoo on the grid of suggested sites.
Sure, there's more than one way to skin a cat.
There are lots of non-technical users who navigate purely by doing a "google search" on whatever domain they're aiming for, too. Nobody said they were efficient about it.