I'll believe this when I see it but until then, sorry but I just don't think it's true.
I am not a Intel fanboy or a AMD one but I can not see AMD beating Intel on performance and certainly not 50%. If they had said 5% i'd believe it but not 50%.
I have read a similar article on Techpowerup which says
"Very little is known about the processor, including at what clock speed the processor was running at, much less what other components were driving the test machine."
http://www.techpowerup.com/tags.php?tag=Bulldozer
On top of that we don't know if the tests are based on multi core or single core and what the tests were. Keep in mind the preview benches for the i5 2400 on Anandtech showed it beating the 980x at most things and definitely above the 950. If it is true credit where credits due and hats off to AMD but the proof is in the pudding and I ain't finished dinner yet.