Speed and timings really only come up in benchmarks. The difference in games will not be noticeable. The only exception being IGPs. An IGP in the Intel or AMD CPUs gain performance because they utilize system RAM as VRAM. So naturally, faster RAM will be closer to GDDR5 performance.
On the other hand, that won't apply to you (or even me). For basic usage and gaming anything over 1600 is kind of a waste of money. You won't see any efficient gains from high speed memory unless you are clocking the IB chips around 4.5 or higher. If you were to actually buy the higher speed then speed over some slight timing changes. Remember, you can always clock them lower and run tighter timings. You can also tweak to get better timings over stock, which is usually always the case.
And as always, higher speed really only shows in benches, but honestly my numbers didn't change much from 1600 to 2133.
Edit: Btw, who the **** lives in Utah? Lol jk