It would really suck to be the crew in one of those things.... bones would be broken, I suspect.
Not really. The planes can be inverted, and while rolling, still have a positive g vector relative to the pilot. It would not be like the dash-cam footage of the guy rolling the car while not wearing a seatbelt.
Also, those big bomber wings have a low wing loading allowing more maneuverability than one would expect.
I do know that B-52's, after they drop, can turn inside a F-15 at altitude. This frustruates the fighter jocks to no end.
While I know that this is not directly applicable to our WWII craft, it does illustrate the point.