Here’s a direct quote from Bill Gates in an article on msnbc:
Q: In many of the Vista reviews, even the positive ones, people note that some Vista features are already in the Mac operating system.
A: You can go through and look at who showed any of these things first, if you care about the facts. If you just want to say, “Steve Jobs invented the world, and then the rest of us came along,” that’s fine. If you’re interested, [Vista development chief] Jim Allchin will be glad to educate you feature by feature what the truth is. I mean, it’s fascinating, maybe we shouldn’t have showed so publicly the stuff we were doing, because we knew how long the new security base was going to take us to get done. Nowadays, security guys break the Mac every single day. Every single day, they come out with a total exploit, your machine can be taken over totally. I dare anybody to do that once a month on the Windows machine.
Every single day?