Have you seen the ads for Microsoft's "Mojave Experiment"? Unsuspecting users are asked what they think about Windows Vista and then are given a computer to futz around with. They ask how they think this computer compares to what they've heard about Vista and they invariably say that it seems much more solid and usable. And then the surprise--it is Vista! You were using it just now and liked it. Aren't you surprised?
The point of the ads is supposed to be that the negative hype is unwarranted and that it actually is a good system and if you used it without knowing it, you'd agree. I think the point is well made--Vista is not without its drawbacks, but it's not quite the brick that people claim it is.
But I have to take issue with the ads on principle. How sad is it when your best advertising recourse is to trick people into realizing that your product doesn't really suck after all?