Can't find the website where it was posted but this was the comment from Duane Forrester about deep links:
"Those things are in there because we know that people interact with that content deeply and they want that content. They’ve proven it to us time and time again over a fairly long period of time. So a lot of this has to do with us trusting that content as being an excellent result for a searcher."
I should hope so :) If I'm linking to someone, I'll link to the exact page or directory the content is on, not a generic "Meh, this site is pretty decent overall". There's even some discussion of this if you look up "bing + deep links" here at WebmasterWorld.
The part I can't figure out is what the tool is supposed to do.