Rob,
Do you feel safe driving 65 on a wet rainy freeway? If you have seen what i've seen the answer would be, no. The best advice I can give is don't pass the POlice in the rain. If I'm driving 50 in the rain, that's probably what I've decided is the safe speed. Two winters ago, it was snowing on 101 by Tully. I had traffic down to 35. The ice was piled up between the lanes. Yes I have stopped people for driving too slow, but....if someone is driving 65 in the fast lane, it may be rude, but it is totally legal. Remember the maximum speed limit is 65. But if they are doing 55 and holding up traffic, ticket time.

22400. (a) No person shall drive upon a highway at such a slow
speed as to impede or block the normal and reasonable movement of
traffic unless the reduced speed is necessary for safe operation,
because of a grade, or in compliance with law.
No person shall bring a vehicle to a complete stop upon a highway
so as to impede or block the normal and reasonable movement of
traffic unless the stop is necessary for safe operation or in
compliance with law.