Kif Leswing assembles a few choice quotes from Steve Jobs directing the iPhone team:
One exec even joked they put in 168 hours a week — out of 168 possible hours.
And quotes from others on the team:
This isn’t good enough. Like, this is it. You have to come up with something so much better. This is not good enough.
If you don’t start showing me something good soon, I’m going to give the project to another team.
You have two weeks
Finally, Jobs found a version he liked.
Steve is pretty much blown away by the demonstration. It was great work. Our reward for doing a great job on that demonstration was to kill ourselves over the next two and a half years.