First of all, I encourage you to add your own results. Here's some comparison times for my older GPUs and 3 of the new Pascal based cards. All are run on Windows 7 AMD Phenom machines with PCIe v2.0 x16 (running at x16). Slowest to fastest comparison using ADRIA_2OV5_AMBER_OPEN2 WUs (averages). All cards are factory OC versions at stock factory OC:

Very illuminating. I no longer have the results for my GTX 960s and 970, since apparently the server upgrade lost the older ones. But I am surprised that the GTX 750 Ti's still do so well; two of them are equivalent in power (120 watts TDP) and output to the GTX 1060. The only problem is that they may not make the 24 hour bonus, but that may not be much of a problem.