Yes, I have told that line to many people in my life, even on this website, and it's always meant to be half-serious. It's also intended to get people to think about probability. E.g., if a pair of magic dice could predict the winner of a horse race 80% of the time, would you be willing to use them to bet on the horses?
In any case I was partly wrong. Peter himself wrote above that there is a small drain on the CPU by the KM Engine when using the Pause statement. But I don't feel too bad, because Dan, who is one of the elite wizards here, also predicted what I did, and he spoke without qualifying his likelihood of being correct, so there's a little more egg on his face than mine right now.
Peter's statement was a bit of a revelation to me. I may have to reconsider my use of the Pause statement. In some cases I have been able to replace the Pause statement by using periodic triggers on a macro. (E.g., instead of pausing for a minute within an infinite loop, just have the macro trigger once per minute.) I didn't realize that that practice could have beneficial effects on my CPU usage.