Hey Andrew thought I’d contribute my 2 nickels. I first heard of UniWB through Luijk and for a couple or so years I “tested” it and thus all that came out my D700 (nikon) were very very sick still images. I don’t remotely have the knowledge to intelligently argument on my findings… but I’ll mention a couple interesting “side-effects”.
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First thing is that I regained a bit the post’s magic. Images were always green so I just checked for composition and histogram/meter/blown/cold symptoms; avoiding to get caught in the colour zone {spooky black}. Was later on the computer that the darkroom like feelings of anticipation and surprise broke free as green metamorphosed into myriad hues.
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A shock at the beginning is incredible how fast one gets used to… well, almost anything, like these horns. The fact that the images were more homogeneous and had less information helped the culling in particular and the dreaming in general.
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There was also a bit of fun when showing the pictures to someone, OMG is all green, what happened?!!! to which I’d respond OMG!! is true we’re totally doomed. Clients’ faces were a priceless treat.
Now, for the question you’re probably after does it make a difference? my answer is yes… and no. In my experience it does make a difference regarding metering/accuracy >> ETTR. So I would say that if slightly but certainly impacted IQ. Why did you stop using it then? could be a follow-up {wouldn’t you agree? =)} because (suddenly I turned into an old 500-pound rheumatic gorilla that thinks the zoo is the world) in the long run & grand scheme of things the improvements I got from using UniWB were almost negligible compared to context-specific needs, mix media (video) incompatibilities, post facilities and speed delivery (some jobs were on_da_spot jpeg only!) and that sort of contraints and conditions, the same that would later make me dump nikon FF for µFT.
There I said it, now a cat, well an UniWB papperdigits’ kitten to be precise. Cheers 