So far, Webmasters are saying no. Here are some quotes:
I get very little traffic from them because they still can't manage to find the appropriate pages in my site to return.
They haven't got it right! What they should do is to syndicate Googles, Yahoo's and Ask's result and skip trying to compete because they can't.
Every person who worked on this project should be fired ;)
I agree, they still have a long way to go. I am surprised at how far behind Microsoft is, I honestly am.
Forum discussion at WebmasterWorld.