Why the hell should I do the speed limit at 4 AM when there is nothing and no one on the roads except me? If I hit something, that's my problem, no one else around... Won't be a problem though since I pay attention to the road when I'm driving.
Want to talk about unsafe drivers? Cell phone users, coffee drinkers, women doing their make up, adults trying to calm down kids in the back seat, guys shaving on the way to work, etc... Don't even get me started on elderly doing 40 in the fast lane on the highway.
A driving enthusiast is the safest driver on the road...and no I'm not talking about teens trying to race. Far as the track goes, the closest one to me is on the other end of the state, I'm not going to drive down there just to drive fast.
That site has it right, if the road is clear for it, you should be able to drive faster. Hopefully in turn this will cause some kind of reform over at the DMV, considering a lot of people don't know what the hell they're doing on the road.