Unless you have a reasonable expectation that someone is about to step in front of your car, the speed limit in such areas is still whatever is posted. If they wanted a lower speed limit, they'd post one.
That statement should disqualify you from driving a car. While pedestrians are supposed to behave, it's YOUR responsibility to make sure that you never drive in a way that makes it possible for you to run over a pedestrian (or hit other cars, for that matter). It's also insane to insist on driving at the speed limit regardless of circumstances. You're still responsible for being able to stop for *anything* that happens to suddenly be in the road, including a kid running after his ball. You're not "allowed" to run over the kid just because you adhered to some maximum speed limit posted.
No, you shouldn't need a "reasonable expectation" to behave like a mindless robot when it comes to speed limits. Sure, the speed limit posted is a *maximum speed limit*, and it's illegal to exceed it. It's not a mandatory minimum speed. You don't have to "expect" that someone will be stepping into the road, you are expected to be able to stop for whichever hindrance might possibly come into your way.
Oh hell, why am I wasting time. It's not "OK" to hit someone at 25 mph. To wrap it up, I hope you didn't mean what you wrote
If you did mean it as stated, I'm out of the discussion. Have a nice day.