This is a pretty good read, he sort of takes you through a general summary of how things transpired from a hardware reviewer's standpoint:
Like many we've been finding AMD's Bulldozer to be underwhelming... and it is. Just don't expect a magic bullet to fix it.
Over the past few weeks we've had AMD’s new FX-8150 CPU in the labs, running a variety of benchmarks to get our head around the performance delivered by AMD’s new Bulldozer architecture. Like many other reviewers we've been finding the performance of the CPU underwhelming, benching below Intel’s Core i7-2600K and even consistently dipping below the Core i5-2500K.