This is the same back and fourth we went through when designing the yearly systems update presentation for staff. Do you demo and show everything ala Steve Jobs Keynote, or do you tell them and show them nothing.

The balance was to show screen grabs of some general stuff. Enough for them to see what is new, but not enough to actually train them. The staff goes away wanting to know more and they paid attention.

While your data is important you should consider the teaser approach. You show just enough for them to get the point and want more. You don’t bore with data but you show a couple graphs, refer to where more data is.

The technique is the same goal a car ad should have. You see why you want the new car, you know it gets better gas mileage and has these new features but you still want to come in for a test drive.