Just got it an hour ago --- just over one week from when I pressed 'order now'. If you guys are wondering why I got it so quickly, it's that I live in Taiwan. Technically, it only takes one day to ship from Shenzhen to Taipei, but I had to wait out the weekend.
How long does it take for the caps and stuff in the D7 to 'warm up' or 'burn-in' ? When I first turned it on, I heard some sibilance control issues that I didn't hear on another person's D7. It's a little better now.
Yes, I would agree with the above that the tonality is very slightly warm, but not overly warm. The dynamics are quite good, especially for its size. It makes my DBA-02 (known for its crunched dynamics) sound more spacious.
I'm running it with Foobar through WASAPI, buffer turned down to the lowest latency (50 ms) to minimize spectrogram lag. I had a few problems with Windows complaining about power output through the USB ports and shutting themselves down, but they're resolved now. I'm outputting it through the single USB 3.0 compliant port on my notebook (which by all likelihood runs off a separate bus than the other two USB 2.0 ports) and I'm having no problems. The single USB 2.0 port that shut itself down is still off, however. I'm going to have to figure out how to turn it back on.
I'm also running SoX resampler in the DSP chain, resampling 44.1 to 192 kHz. 176.4 kHz doesn't work natively either (odd, considering that 88.2 works), so I'm also upsampling that. XMOS takes in the signal (no errors in Foobar) but no music comes out.
However, I'd say that, on equal terms, straight from a USB output, the DACPort still has a blacker background and sounds slightly more refined. Perhaps the D7 will improve with time. For its price, however, the D7 is already no slouch --- quite the value.