DXOmark comments miss the point, in my view
The Nikon 1 _system_ size and weight falls between compact cameras, and M43.
The 1 series offers much smaller size & weight than an M43 camera w/ a 300mm zoom lens, and much better IQ than a compact fixed lens camera. In reality it falls between the previous categories.
Compare the size of the Olympus M43 70-300mm lens, 600mm equivalent, to the 1 series 70-300, 810mm equivalent. The Nikon lens is much smaller and lighter. (The Olympus lens has the advantage in speed of course)
As such, in my view, the 1 series is more of an _alternative_ option, rather than a "head to head competitor" to M43 cameras.
There are pros and cons to both systems, and for some who care less about long zooms and/or ultimate portability, the M43 format and Sony NEX systems are great choices. But there are tradeoffs - including the size of longer zoom lenses, and these are not well reflected in the DXOmark comments above.
If we're going to compare the 1 system to M43 cameras, imho it would be more equivalent to include the size & weight of long zoom lenses in the comparison.
Of course, DXOmark measures and compares sensors, and I get that. The comments though attempt top compare factors far beyond sensor performance, but do not do a good job of presenting the full story, or some of the other places where the Nikon system has advantages.
Disclosure: I have no affiliation w Nikon or any associated companies