For memory reviews we use synthetic benchmarks, so we can better compare them to real world applications.
The kit does not run faster compared to DDR2, but with some BIOS optimizing you can improve it greatly.
Everest benchmarks shows no significant differences. Of course higher clockspeed can improve the rates, we compared scores only at the same CPU-speed.
Everest also benchmarks the latency; higher clocks means more latency, but low frequency with low latency needs higher latency on the chipset, which increases access latency substantially. On our board the chipset latency was locked with "Boost 0" settings, so only the frequencies were altered. For the optimized bench we set the FSB-strap to 266 instead of 333, which improved the speed greatly.