Distribution is not done evenly between nodes. It is dependent on amount of EMU held at each node and amount of verified transactions done by each hatcher.
EMU-based distribution is pretty straightforward, although I don't see the point since this amounts to (perhaps somewhat randomized) even devaluation of currency.
What is interesting is the trust-based allocation. That key point deserves more clarification and discussion. Well, I guess the source code will give us the final answer.