While I hope the PM way is better then Slashdot way - we cannot deduce that from the current state of affairs. On slashdot you have more than 20 times more users, we cannot guarantie that the PM system would scale to that level. Additionally judging on some programming subject is much easier then in more political matters - you can usually verify it by executing relevant code, or by checking the documentation.

I believe the shlasdot zoo system has much potential.