I agree that it is quite different at startups. The startup environment felt basically a glorified college environment compared to the large company culture. With that said, I would image eventually all startups have to grow up and embrace enterprise-style processes. Facebook is the example that comes to mind. When they first started, the followed the "Move fast and break things" mantra, but as they aged and took on more and more users, they had to change and become a company that valued reliability over new features. I believe their current mantra is "Move Fast With Stable Infra."?