That review was before the Boost edition cards came out, and you must take into consideration that some of them were running faster than stock speeds.
I'm using a Sapphire 7950 OC/Boost, and passively overclocked to 1050/1450 which is similar to 7970 Ghz speeds. Didn't even need to increase core voltage. Runs stable and doesn't exceed 60 degrees C at full load.
Now with news of Gigabyte and XFX voltage locking their cards I would avoid buying AMD cards from them.