Has anyone tested if overclocking is actually increasing performance?

The msm8226 chipset is known with other phones (like the Moto G) to be hard locked at 1.2ghz. If you overclock above that amount, benchmarks don't increase, which means you're still actually running at 1.2ghz.

Has anyone that's overclocked this phone done any benchmarks to see if it's actually working? I'm a developer, and I'm interested in seeing if there's a way to actually overclock these.