This should not be a surprise given Samsung’s blatant theft of intellectual property, but now it appears the Galaxy S4 isn’t as fast as Samsung said it is. AnandTech with details on Samsung’s latest– a benchmark test that changes the clock speed of a CPU:
What this does mean however is that you should be careful about comparing Exynos 5 Octa based Galaxy S 4s using any of the affected benchmarks to other devices and drawing conclusions based on that. This seems to be purely an optimization to produce repeatable (and high) results in CPU tests, and deliver the highest possible GPU performance benchmarks.
Stay classy, Scamsung.