I'd guess it's soft partly from NR and partly because the lens was wide open.
The catchlight on his eyes is because I had the tv on.
Here's some more low light high ISO shots from a guy on pentaxforums' blog:
http://www.techtheman.com/2010/01/pe...isneyland.html
http://www.techtheman.com/2009/12/pe...iso-shots.html