Juggernaut,
I think your theory about the pressure drop has some merit. Denny Rickards, in his book Flyfishing Stillwaters For Trophy Trout, claims that the lower the pressure is, the more sluggish the trout will be. Fishing improves when the barometer is stable and above 30 and below 29.7 you might as well stay home. (I'm reading about 29.8 right now) Most river fisherman know that the fishing is usually not good during the storm/rain when the river is rising, but after when conditions have stabilized and the river is beginning to drop again. I've often wondered whether this affects fish in saltwater but it makes sense to me that it does especially when its a sudden change like we just had.