My brain shut down for a second when it read "I heard AMD bulldozer was pretty good" but then it finally got back up to speed and read the final 2 words "for OC".
True, definitely some people getting solid overclocks out of them, also getting some extreme power usage from them too!
In this same vein though some people were getting 6+GHz clocks out of the Pentium Ds - and barely seeing a real world uplift in performance... I had similar with a Celeron I used in a secondary system, so long ago now I can't remember details, massive clock speed increase but mediocre real world performance uplift.