It's MY fault. I have to be precise. Bing won't help me. I have to meet its expectations. Google, on the other hand, if it can't get what the user asks for, has always done its best to figure out what the user really meant and do its best to satisfy that user. When I type the same misspelled phrase into Google, here's what I get:
"I couldn't find exactly what you wanted, but here's the next best thing, the closest I could come to what I think you want. Is that OK with you?" That's what Google says. Not, "Hey dimwit, pay attention and do it right, and then maybe I'll deign to speak to you, and then again maybe I won't," which is how Bing's message feels to me.
This feature of Google has been around a long time. It recognizes that users are human. Bing's behavior requires users to become more like a computer: diligent, thorough, precise. We are none of these things naturally, that's why we invented computers. Google recognizes, respects, even enhances the humanity of its users.
If Bing intends to seriously challenge Google, Microsoft is going to have to change its perception of who its users are. Because the one thing that every single user of Bing has in common is that they are all human.