So.....with my puny 12 Gh/s rig I might as well forget P2Pool right?
If you are running the miner 24/7 and plan to just leave it run for weeks/months, then it will average out in the end.
Some people need a steady stream of cash, as they spend the money as it comes in. They need lower variance.
It is hard for me to imagine anyone with 12 GH needs to use it to generate consistent cash. At that point your expected income is around $2 per day. If that goes to $0 for a few days or longer (balanced out by some higher paying days), who would even notice?