I don't speed in Europe because 130 km/h is a perfectly fine limit; I've driven faster on uncontrolled Autobahn segments, but I'm not bothered when there is a limit. 65 mph on the NJ Turnpike (and only on the southern part) is not.
a crash at 80+ is so much worse than one at 65. and American highways are not the Autobahn. different design and engineering.
Being straighter is actually bad for safety (highway hypnosis).
You’ll find long stretches of interstates with no guard rails as well as state highways with direct intersections with rural roads.
No cop is going to ticket you for going 70-75 on the turnpike.
Unless it's the end of the month and they have to meet quota and blah blah blah... Australia seems to get away with ruthlessly enforcing ridiculously low speed limits. The correct speed limit, by your own comment, seems to be 75 (120 km/h) at least.