Oh, please. Half the damn signage in Texas hasn't been updated from 75, and if you weren't a Texas resident to read when the State updated the daytime speed limit to 80 in the newspapers, you wouldn't know that signs notwithstanding, 80 is the speed you should be going in the day. If you're just passing through the state, speed limit signs on parts of the interstate that haven't been updated still tell you 75. If anything it was a masterful move by Texas LE to engineer probable cause to do a traffic stop on anyone who wasn't a local, which would tend to select for non-resident traffickers.
I say this as someone who was a resident in the state when that change happened and is disgusted every time I go through and see unupdated signs. It is disingenuous, yet effective, profiling of the worst sort that seems to be ignored by most in favor of thinking like quoted poster's.
I seem to be of a minority that believe that a State has an obligation to clearly and consistently communicate the actual state of their traffic management regime to drivers from in and out of state via signage. Not play games to manufacture justification to surveil subpopulations that aren't likely to be represented/incapable of voting.