At RMAF I set up two rigs at the CEntrance table, side by side and compared them. One was a laptop with lossless music feeding the M8, the other was an iPad with the same lossless music and camera connection kit feeding a DACmini. I plugged in a "dual 3-pin to single 4-pin XLR" adapter into the M8, and a "singled ended 1/4" to 4-pin XLR" adapter into the DACmini.
After volume matching the two rigs, using my LCD-2 with Silver Dragon 4-pin XLR cable, I was able to play the same song on both rigs and move back and forth quickly between the two rigs. The result was that the M8 sounded just like the DACmini in every way - great balance and PRAT, great extension, detail, transparency, weight and body, and immersion into the music. Despite the noisy meet environment, it was clear that the M8 gave up nothing to the DACmini, and it's still a prototype. This is better than we could have hoped for in such a small package.
See my photos
http://www.head-fi.org/g/i/700446/a/699604/sort/display_order/
And the DACmini was not held back by the iPad with CCK because it does an excellent job at jitter rejection and has always sounded the same as USB input from my Macbook Pro. I really don't think that swapping the transports to the other's rig would have made a difference.