ditto. My coworkers will sit down at the whiteboard and start making ERDs, and I'll just start writing a DB migration and sketching up the models. They think I'm crazy, because I have to do rollbacks and recreate my table a few times as I think of more things, and I wind up deleting some code that I already wrote and technically worked. Who cares? Time-wise, it comes out the same in the end, and I find and solve more hidden surprises by experimenting than they do by planning what they're going to do once they're finally ready to type.

I think it's just two ways of doing the same thing.