While you're talking about speed limits, my post was about actual car speeds, and how a difference of 5% (from your data) means a great deal when it refers to your survival chances.
> There's about a 17% risk of death if you're hit by a car going 30 mph, vs 12% at 25 mph.
While I understand that, I wasn't just talking about that statistic independently. I was responding to a person who brought up the 'think of the children' argument and isolating them as a smaller group. The total number of fatalities amongst children we're talking about within that speed is quite small and potentially 0.
That's why I brought up the effectiveness of change in posted speed.
> There's about a 17% risk of death if you're hit by a car going 30 mph, vs 12% at 25 mph.