The argument was that you would probably work on something "long enough to accomplish something", and that's true. I mean, the Google Wave team did accomplish

The argument was that you would probably work on something "long enough to accomplish something", and that's true. I mean, the Google Wave team did accomplish something. That isn't always true at a startup. Many times, you get hired to work on something that you never complete because you're constantly diverted to go put out fires elsewhere.