The WM8740 DAC doesn't support DSD, so...
There is already a review in English with measurements from British audio magazine, Hi-Fi World.
That Hi-Fi World article doesn't comment much on the gap-less playback, no testing with high-end headphones or IEM's, and DSD playback doesn't work, which seems to correlate with the wrong choice of DAC for that feature, as has been pointed out. No comparison with HiFiMan, Colorfly or iBasso DAP's, once again.
On the german A & K page, there a link to what appears to be an article to be published in Audio.de's June edition magazine, in which the magazine's editor Christine Tantschinez seems to confirm gap-less playback. It seems there indeed is an option to activate it in a menu, as can be seen in the illustration. However, the output impedance the lab mesured wasn't 3Ω as A & K advertises but 5Ω. The graph is rather unlegible for further usefull information.
Edited by the wizard of oz - 5/10/13 at 8:44am