Don't think this has been posted yet, sorry if it has...
Anandtech got to do some very limited testing with Kentsfield, you can see their results here - http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2846
Anandtech got to do some very limited testing with Kentsfield, you can see their results here - http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2846