This isn't really that bad.
Some of the initial performance reports where very negative but this looks very good to me for a generation one processor. There is good reason now to save a few bucks going AMD as the performance penalty isn't overwhelming
It will be especially interesting to see more testing with different configurations of the processors. We simply don't have the experience to imply anything about cache trade offs as the architecture is so new.
The other thing to realize is that there has likely been little in the way of Bulldozer specific optimizations in these tests. That would be switches for the compilers. Even though some OS optimization has been done that doesnt preclude any other improvements specific to Bulldozer. In the end AMD could be sitting pretty with a hardware revision and some optimized compiler technologies.