Everything on our backend uses P2Pool. Payments are processed by the network using PPLNS. All payments for P2Pool are also "Generation" transactions. This means you end up with coins on your address with "Mined", instead of "Received from
Is paying out mined coins in the coinbase a native feature of P2Pool or something you customized? My TRC pool does that, I rather like it.
Native feature of P2Pool