I cannot specify that in technical terms, but my own render results tell me that.
If that test were to be repeated with a small scale displaced terrain, also with shadow areas, you would see what I mean.
Also, remember that for example the GI setting is "relative detail", and it's relative to the master detail setting.
This is also the reason why in this sky render, you see that the shadow side of clouds is brighter at detail 1, compared to detail 0.8.
However, these days I rarely use detail 1, because I can get almost equal, subjective render quality with detail 0.8-0.9
Another reason is that I'm not exactly patient

so these numbers seem just the right compromise for me personally.
Lastly, when you want decent underwater detail, you even need to increase to beyond detail 1. So you're not going to see many scenes with visibleunderwater terrain from me, that's for sure

Cheers,
Frank