It almost goes without saying, but benchmarks are not everything. These numbers don't always tell you how a device will perform, but they do tell you something. Right now the Galaxy S6 is telling us that Samsung's new Exynos chip is very, very fast. It's putting up AnTuTu scores of nearly 70,000, well above the values produced by devices like the LG G3, Nexus 6, LG G Flex 2, and even the new HTC One M9.
The number comes from a benchmark captured on video at MWC, which you can see above. Exynos chips tend to do well in AnTuTu, but hitting nearly 70k is wild. All the flagships from 2014 hit 40k-50k. As for the HTC One M9, well that was captured on the video below. It manages about 55,000 — a modest improvement thanks to the Snapdragon 810.
These are, of course, devices on the MWC show floor. The software might not be final, or there could even be some shenanigans going on with benchmark detection/overclocking. This isn't the last word on which phone is faster, but it's pretty interesting, isn't it?