Speeding laws has been untouched for almost a decade here in florida, Cars have become significantly safer in that time. 85-100 MPH is reachable for most modern cars.
On the city streets I never drive more than 10 MPH over the posted speed limit. On the Highway i go maybe 20-35 over. It shouldn't take 4 1/2 hours to drive 330 miles i.e orlando. I always hit over 100 and i get there in about 3 hours.
I have my cheap little radar and that saved me a couple grand already