Just to follow up on the "48 hours adjustment" part of the above, it really does work well, though it takes a bit of getting used to. For the first couple of days all your results will (likely) look pretty low as ND is plugging in a generic per-click value, then whooosh the real numbers get retroactively applied and it's time to start smiling again.
You'll easily see when the real numbers come in because the per click won't be a nice round number any more
The real lesson is to plan for and allow the lag to work its way through the system. In other words, plan to test a domain for at least 4-5 days so that you can see the click pricing dropping into place.