I'll tell you a fact right now: nothing is ever consistent.

Everything is a part of a bell curve. The average may be a certain number, but it can and will deviate from time to time. Sure, we can get it close to the mean, but it can still deviate from this, even if it is a small, almost insignificant amount.

That being said, Maxis has hit everything on the spot. You do need to have faith in your recall. The more you believe, the more it becomes true.