that's great if you're really, really certain that your definition of a "feature" is one that the customer will accept. A few years ago I was working for a consulting firm that had this bad habit of pitching something, and the customer would somehow think they were getting something much much bigger than what we promised, and we'd either end up working for free or the client would end up angry and walk away.
Oh, that's clever! A press release is going to be much better than any acceptance test or design document. I can't believe I've never heard of anyone else doing it that way!
