Agreed, one could argue a single day opener would draw more than any of the days in the three day, so they will be very conservative.
Is there live data posted somewhere? The WDFW page I looked at is all blank.
I'm actually surprised it's going 3 days with the catch rate. Remember, there are several limits - legal, mature w/fins, and sublegal. Some guys are going through several legal but smaller fish to get the one they take.