It is widely believed, that medium format delivers better image quality. Because, as they say, size matters.
But. According to this article , 1DX pixels are physically larger than pixels in Leica S2 (S2 sensor area is larger, but it also has to accommodate more pixels). I imagine this is also true for Hasselblad and other high resolution medium format cameras. Today, pro-level DSLRs seem to have better noise reduction at high iso, have lenses and are significantly cheaper at that.
Obviously, this is not only about size. And I personally haven't ever seen a side-by-side comparison of any wide format vs a professional canon or nikon.
Can anyone explain to me where the talk about higher quality of digital medium format coming from and, maybe, provide some evidence to back that up?