Give us two exactly alike captured raw files so we can judge ourselves
JPG is not valid.
John Sheehy has done some calculations on how many Mp a good lens is capable of, and for example the Tamron SP90 is capable of much more than 100Mp (24x36mm sensor area.)
That would be 100mp at what MTF? A lot of people talk about lens resolution at an MTF 0% (which is ridiculous, the only time MTF 0% has ever been particularly valuable is when scientifically analyzing deep space star photos to determine if they might be binary or tertiary stars...as far as an image sensor is concerned 0% contrast means ZERO difference between pixels except what you get from noise.) A lot more people talk about MTF 9%/10%, which is the limit of HUMAN visual acuity (which, thanks to our brains, is a hell of a lot more acute than a pixelated bayer image sensor regarding what our lenses actually project onto our retinas, we effectively get biological superresolution with our eyes and are able to detect much finer gradations of contrast). The standard MTF for testing lens and camera resolution is MTF 50%, which is still pretty low in contrast overall, but high enough for cameras to detect enough difference between pixels that it doesn't just look like noise.
At an MTF 50%, the only way you could actually achieve 100mp worth of lens resolution would be at a very wide aperture with a perfect lens. At least PERFECT diffraction-limited f/2 lens that exhibited ZERO aberrations would barely be able to produce enough line pairs/millimeter (lp/mm) for 100mp, and monochrome 100mp at that. You would probably need a perfect f/1.4 lens to produce enough resolution for a bayer 100mp sensor. That is ignoring system blur, which impacts overall system resolution. You might get a total system spatial resolution of 245lp/mm out of the whole setup, which is about "52mp" at MTF 50% for a perfect f/2 lens and a 100mp monochrome sensor, and maybe "35mp" or so for a 100mp color bayer sensor.
Mikael Risedal have shown that who are corresponding to 75 Mp and a with Nikon 85/1,8 http://forums.dpreview.com/forums/post/41009176
As far as I can tell, there is already diffraction blurring in the samples posted by Mikael at f/4. If it was really "75mp equivalent", I would expect to see FAR more brick detail, but at 100% there is very little. There is also a noticeable drop in contrast between the f/4 and f/8 images, which indicates that diffraction is indeed affecting the image at the narrower aperture.
The perception of diffraction is very skewed in general among photographers. It is not as if the moment diffraction occurs, your IQ goes completely to hell. Diffraction gradually eats away first at contrast, then at detail, as you progressively stop down. Once you pass the DLA of the sensor, diffraction's impact is largely in the area of contrast...when the outer regions of the Airy PATTERN begin to affect other pixels. The primary point of light is concentrated in the center of the Airy Pattern...the Airy DISC. It is only when the Airy Disc grows larger than the size of a pixel and begins to affect other pixels that you actually experience visible diffraction softening.
I am not sure what the DLA of the Nikon V1 is...I would guess somewhere around f/4, so its not surprising that there is a loss of contrast at f/8. I would expect that blurring sets in pretty soon after f/8, though.