Take away all your understanding of search and the way the web works.
Sit down in front of your computer and open IE,etc...
What page loaded? Thats where you search from.
I have noticed over the years that most people DONT HAVE A CLUE WHAT THEY ARE DOING AND DONT CARE....
I am amazed how many people i hear @ restaurant drive thru's order the wrong soda!! (They are totally unaware of what soda the place has,its quite sad really)
I mostly goto google and if i cant find it there i goto yahoo......
My ISP created thier own search page for invalid URLs entered in address bar ... I opted out of that straight away!! (Im actually surprised they had an option to opt out)
Do you think the "average" user understands or even cares about the benefits of one SE vs. another?