Yeah I think people need to just look at it as a choice. I have a 5D and have been playing around with Nikon and Mamiya primes. The auto iris feature no longer works with those lenses so when you put it at f/8 you see f/8. I kind of like this because even though it's darker I'm more aware of how changing the iris affects the image. I've debated this before but I feel frame rate and contrast have a lot more impact on what gives film it's look.
Robert Brown
Editor/VFX/Colorist - FCP, Smoke, Quantel Pablo, After Effects, 3DS MAX, Premiere Pro
http://vimeo.com/user3987510/videos