Quote: with the K5 being far slower to focus on fast moving objects.
Those of us who don't often focus on fast moving objects don't notice much difference. Neither do most of the test sites where on stationary objects teh difference between a Nikon System in bright light and low ISO was measured in 1/100s of a second. People should be warned though, if you are going to base your purchase on shooting fast moving objects. Pentax isn't for you. The subjects I shoot, I ask them to hold still or they are still, like still life or landscapes. I'm sure I'd get more seagull in flight keepers if I was shooting Canon or Nikon. But that's like twice a year. And I still get some keepers. Not as many as I'd get with a Canon or Nikon, but I'm usually only looking for 1 or 2, so it never becomes an issue.