I'm gonna quote from the developers....
Our code has been reviewed by Nvidia, Microsoft, AMD and Intel. It has passed the very thorough D3D12 validation system provided by Microsoft specifically designed to validate against incorrect usages. All IHVs have had access to our source code for over year, and we can confirm that both Nvidia and AMD compile our very latest changes on a daily basis and have been running our application in their labs for months.
Immature drivers are nothing to be concerned about. This is the simple fact that DirectX 12 is brand-new and it will take time for developers and graphics vendors to optimize their use of it. We remember the first days of DX11. Nothing worked, it was slower then DX9, buggy and so forth. It took years for it to be solidly better then previous technology. DirectX12, by contrast, is in far better shape then DX11 was at launch.
If you run the Ashes of the Singularity Benchmark, what you are seeing will not be a synthetic benchmark. By that,we mean that every part of the game is running and executing. This means AI scripts, audio processing, physics, firing solutions, etc. It’s what we use to measure the impact of gameplay changes so that we can better optimize our code.
http://www.oxidegames.com/2015/08/16/the-birth-of-a-new-api/