These tests are useful and providing results "outside the norm" is good, but keep in mind my comments in another of your image test threads - the values within the default slider range are the "suggested" values in most cases, and they will generally show the greatest variation and possibility for realism. This is not always the case and these ranges will be adjusted for the final release to provide a better range of realistic options, but for now they already do show sensible ranges of settings.
- Oshyan