I'm very impressed Scott, this is amazing, and bears out my hypothesis that the greatest advances in film photography in the last 25 years have been in the films, more than the hardware.
Yes. Portra 800 is a truly remarkable emulsion. It isn't quite as contrasty, saturated or fine-grained as 400, which isn't quite as contrasty, saturated or fine-grained as 160, but that's not saying much. I remember back a decade ago shooting some Fuji 800z and really feeling the grain, which is to me far more objectionable in color than it is in black-and-white. With this, I don't think I'd feel the grain until I got into some sizeable enlargements.