I was very skeptical as well for a long time and then I did a 48hr test on 3 1070's on the same rig with the exact same OC's. One running bminer, bminer -nofee and dstm. So bminer seems to start a little slow but by the end bminer was ahead of dstm by a bit so it seems very comparable if not a little faster but who knows exactly with miner luck and what not.. In the case of 1080ti's i find it runs better than dstm.. Thats what i got from my tests... I still like running dstm on my rigs for stability with a monitoring program keeping a eye on it.