One of the mistakes web developers make is to spend too much time perfecting the code base in a project. This waste too much time and ignores one very important fact: you need to get the software into the users hands as quickly as possible, so they can give you feedback.

In his short video (stick with it, he talks dev at about 2:35) he talks about the concept of not getting caught up too much in quality of the code at the sake of the progress of the project. He mentions a non-programming related allegory of the PS3 and XBox 360 and the "first to market" advantage that it has.