I was invited to be a mentor for Lean Startup Machine Austin this past April and I have to say that it was fantastic.

The A/B test crap is just that.. crap.

Where Lean does make sense is applying the scientific method to the startup process. If you can identify your assumptions, figure out a way to test them, and then adjust accordingly, that is a fantastic thing. Every assumption is a risk, this is just a process for addressing/mitigating them to determine which are "good enough."

That said, every time I hear the word "pivot," I want to hit someone. It's been so misused and abused that it's lost most of the meaning. :(