If Bing (via IE+toolbar) improves its results for me by watching MY behavior (behavior I OWN, not Google), regardless if I'm on HN, on Amazon, on Google, or on some random-website,
I'm fine with it.Watching IE (+toolbar) users' behavior is not the same thing as using Google's work.
If you can't come to terms with the way click-stream data is gathered and how post processing works, that's your failure, not Bing's.
It's like if you don't get spoon fed exactly the flavor you expect (the one that agrees with your preconceived notion), you spit it back in my face.
Google came out and blatantly said Microsoft is copying its index. That is nothing more than a simple lie, that's designed to be easier to believe over a more complex truth.