I'm still using the quick and easy MPts numbers you see running the Command Line client. It lets me rank my different computers. (I just use the 4 minute number). On a computer that is idle, it is within a few percent of the Muon Calc. So, one PC is a 31, another is 15, another is 61, etc.....Your friends who need to be convinced about DPAD can trade those numbers to compare their power.
If you need to explain what an MPt actually is, it has to do with how many millions of Muons make it down the particle accelerator through the solenoid rings. If you run the Graphic version through one or two simulations, it becomes pretty clear. It is really just a cloud of Pions and Muons moving down a magnetic tunnel after DanC's massive tantalum rod has been bombarded by high speed particles.