I'd like to point out that there is a difference between what musicians refer to as audio latency and DPC latency, even though high DPC latency can cause similar results to what happens if your soundcard isn't set up properly for audio programs.
Audio latency in music programs usually refers to how well your sound card handles the audio, and if you need to increase the latency from the program to the soundcard in order for the buffers to be able to retain enough data to avoid stutters.
DPC latency is more system wide, but if for instance there was an added delay related to DPC latency when talking to the soundcard driver, then you might have to increase the audio latency to compensate, in effect delaying what you hear further away from when the sounds are triggered in order to make sure all the hardware/software involved can keep up.
I'd also like to repost what I said in the other thread as there are other factors that can cause DPC latency, and it would be easy to get them confused.
How many of the people who have seen this are still using the upgraded version of windows 10 as opposed to a fresh install? The upgrade will use older drivers (designed for win 7 or whatever) in compatibility mode which induces latency much like the results seen on screenshots.
Another time I've seen high latencies like this is due to a bug in the intel.inf motherboard drivers installer on x64 bit systems not actually installing all the necessary drivers. The same installer package will install drivers properly on x32 systems, but leaves loads out with x64 which does lead to timing instabilities, highe latencies and less performance which can affect the WEI score.
Installing the package with the -overall switch usually results in better performance and latencies.
I'm not saying that there isn't a problem with the Nvidia drivers, but it would be much easier to isolate if these other issues were ruled out of the equation.
I did see the Nvidia driver spiking with my 780 before I did the fresh install of windows 10, but this didn't really noticeably affect benchmarks or game performance for me.
I would say that the measurements we are seeing are only the surface so unless you are a high level engineer or you write the drivers, it will be very difficult to pin down exactly what part of the hardware or code is causing the spikes.
My 1080 arrived the day after the beta drivers were released and they are the only drivers I've ever used for this card. DPC latency has been fine for me.