I do agree with you on the fact that the most interesting technical work is indeed done in large organizations, but it has (at least in my own experience) always been the case that the companies strive to get lots of clients instead of trying to choose the ones where they think they could do something awesome with. You know?

I suppose I came out a bit aggressive on the fact that it's about small vs. large organizations only, but this was just my own personal opinion based on (only) a few years of experience in the field.

I'm not ruling out large organizations, and large organizations can also be all up for the new and interesting stuff, but that's not the case in the bureaucracy companies (which I'm ruling out) where everyone is stuck to the standard in-house CMS, programming language, or framework.

There's always exceptions to every rule. I agree with that.