In Oregon, since a citation cannot be issued for a speed that is less than the 85th percentile speed (actually, the next 5 mph increment up) as determined by a recent traffic survey, it is more likely than not that exceeding the 25 mph posted speed limit was not actually illegal. (It's pretty rare for the 85th percentile to be less than 5-10 mph over the posted limit.) It's a lousy situation, but it is what we live with.
Our traffic engineers can't even set speed limits below that 85th percentile level, which is why some pro-bike traffic engineers in PDX have taken to using the timing of the traffic signals to calm the traffic. Spare_wheel has written about this strategy previously.