low n' slow, I wouldn't worry completely what other think, you yourself cant be too judgemental, keep on the task at hand- first fly/ operate/handle the aircraft, use a respectful and professional tone,
I understand there's a little salt behind my advise, and an captain has earned his station - it doesn't hurt to be polite- and deferential, the way you speak to your elders
but, most "real" captains would probably want you to speak up if somethings a little off... cap'n it's the 030 radial, or a lot off, uhm L and C hyd have failed!!!
But, even if they do mind speak up... because the captain always goes down with ship ... along with FO Cabin crew possible a few hundred people all the poor puppies in the puppy snuffer area.... remember balance and perspective... I didn't make that up... now get on with, as you guys say
rhov