How bothered are MS about leaks?

Hi all,
Im just interested to know this. I can remember as far back as whistler when those leaks were fast and furious, what if any measures MS have taken to combat leaking outs. Vista, granted had quite a few leaks if memory serves me right but over a longer period of development i suppose that was to be expected. Which brings me to 7. Seems that we have had quite a few leaks of this as a shorter cycle this surprised me. ( not saying im not gratefull to play with new things, which i am) this brings me to my point.
So how many of you think they are bothered about leaks? surely they are getting feedback from real world enviroment so it may benefit them.
It would just be interesting for me to know thats all. lol


Regards

I believe leaks work for M$'s own benefit...

This way they can silently "test" more and more builds, without having to release several public betas every once in a while.

The fact that Microsoft spokesmen have stated that they would welcome feedback from whatever build you are running is, I believe, an acceptance of the leaks

I suspect MS encourage these leaks. Users are creating a hype that the marketing department can only dream about.