What the new platform lacks in performance increase, it certainly makes up in new features. Have a look :

Anandtech (http://www.anandtech.com/chipsets/showdoc.html?i=2088)
Bit-tech (http://www.bit-tech.net/review/326/)
Hexus (http://www.hexus.net/content/reviews/review.php?dXJsX3Jldmlld19JRD03ODg)
HotHardware (http://www.hothardware.com/viewarticle.cfm?articleid=542&cid=1)