I was getting around 305 Sols/s per GTX 1060 3GB using dstm 0.5.7 (didn't try 0.5.8 because some people were reporting issues with it) and now with bminer 5.0 I am getting around 310 Sols/s per GPU, or 1.6% improvement. Modest, but worthwhile. Mind you, it's only been running for about 1 hour at this point.

The -no-timestamps switch is a step in the right direction, but I still want to see cumulative mining time.