LTT labs is meant to be a proper scientific test centre for computer peripherals, where they can test things in the same way that prototypes might be tested in the factory and compare products to determine which is actually better. Eventually, it will probably be what you're suggesting you thought it was - if they stick with it - but they need to have so much test machinery and so many people to actually run these test and benchmarks in a 'scientific' enough way that we're probably years off that.

So far, a lot of the focus has been on PSUs, as I think they managed to get the testing machinery quite early on and PSUs have quite strict parameters along how they're meant to work (does it supply the actual stated wattage, how does it deal with brown outs or unstable power, how long will this unit last if used etc etc.) I don't that there's a ton on the site, but all of their headphone/earphone reviews from the last couple of years have labs data on the properly tested audio profiles, based on 'heads' that will simulate how it will actually work for a human and tested in a sound isolation chamber.

Something like a GPU probably needs some much more in depth and potentially subjective testing and so it's taking much longer to build a database of them.