My impressions of the Q, cross-post from another thread...
Our area Pentax rep popped into the store with a pre-production version (0.30) of the Q on Friday. Focusing was very quick and accurate, it's a very "snappy" camera in operation, all the important functions are close-at-hand, none of the menu-fumbling/dial-turning that you do on a NEX. If you're coming from a K-7/K-5 the interface is second nature. I was impressed.
He had some sample images from marketing that compared the Q to an Oly XZ-1 and a Micro 4/3s model (don't remember which, may have been Panny GF-2 or Oly EPL-2). The sample images were also from a pre-production Q.
At base ISO the Q is much better than the XZ-1, and it came close to matching the output from the M4/3 camera, the images were 100% crops from a test scene. The ISO 6400 comparisons were very different, the Q uses a ton of noise reduction on the JPEGs, however fine detail wasn't
completely obliterated. Colour accuracy at high ISO was superb, the other two cameras had a colour cast. There were no RAW-converted samples to look at unfortunately.
Of note, the 8.5mm f/1.9 is sharp corner to corner...the lens on the Oly XZ-1 is completely useless for corner details.
He only had the 01 and 02 lenses, not the fisheye or the toy lenses. I'm quite excited to some images from the fisheye lens.
Also, apparently, Pentax will produce a K-Q adapter!
Any questions?