That's true. The outfeed fence should be level with the bit. It's the infeed that determines depth of cut.
Quillman, I'm working with kiln dried and 100 year old air dried oak to make window frames at the moment. I don't have a jointer or planer, so the router is doing this work for me. Yes, some of the wonky bits of wood are over 1mtr(1000mm)long, what ever that is in medieval measurements.
Oh, I should say that so far it's working ok for me, but life would be a lot easier if i could buy a combination jointer planer here for under 500 euros.