In reply to UKC Gear:
Got my DMM Pivot today. The lowering definitely works (and better than I expected).
I set up two identical systems in guide mode with BD ATC Guide and DMM Pivot (same carabiners used) with 10kg load each. Then equalized the releasing system so that if the sling is pulled, both of devices would receive the same amount of force (for releasing, that is). The load under the ATC did not move at all while the load under the Pivot was moving slowly down. I gave a little bit more force and almost dropped the weight at my feet while the load under the ATC just creaked a little bit. After several tries, DMM Pivot always was easier to release.
I tried to use the Pivot and the ATC Guide independently with 20kg load. The results were even more significant and a lot more force was required to release the load under ATC Guide. Sadly, I am not physicist and I do not have any equipment to quote any figures.
Overall build quality seems really nice and the release hole is big enough to fit most of the carabiners. The pivoting bit is not as annoying as I worried about - it does not make the device any bigger. I believe that the Pivot is even lighter than BD ATC Guide.
Due to the exams, I can't make a field test, but I have never been so much excited about the belay device (not even Grigri) before!
P.s. 8.5mm rope was used.
Post edited at 20:54