You have to do about 15-20 over the limit on any given road to keep with the flow of traffic here anyways..... not that I do that, obviously.
65, 75, and 80 MPH are some limits here on certain roads. *edit* guess we have 85 now too, didn't know that!
http://www.cnbc.com/id/49520151
Nothing too crazy though, we don't have an autobahn-like system. Although the autobahn has speed limits too, it is still a pleasure to drive on.