ePHOTOzine.com just published their full review of the K-5. Looks as if real-world performance matches the expectations raised by DXO. And the rest of the camera performs at that level.
Hoya has succeeded in bringing Pentax along very nicely - this model competes very well indeed in the $1,000 to $2,000 price range. Canon and Nikon will have to work harder now and that competition is good for all of us.
DxOMark's scores, unfortunately, just don't predict real world performance very well(there are many examples of this, e.g., Nikon D5000 vs. Canon 7D). Specs look very good, though, and I'm looking forward to reading the professional reviews to see how it stacks up.