I second that. Been using LP since day one, which is only a week ago, but haven't seen any difference in battery life between my phone and my wife's phone, which does not have LP.
x3 on launcher pro since day one. it's made docks tolerable for me. furthermore i've never had it use more resources than necessary-like I don't have 3d app drawer. one thing I wish for in future rom updates is better/sexier launchers.