Storm,
Always heard the bite is better at lower pressure. I also remember a fishing conference in Memphis about 5 years ago that said the same thing. They said when the twigs are floating laying down on top of the water it's a low pressure condition. If the twigs are standing up it would be a high pressure day. Started watching that and found that to always be true. They also said that in a high pressure situation it pushes the fish down into the water level. In a low pressure situation they would be shallower. I'm no expert but it makes sense.
Let me know if you find out anything more definitive.