Because core per core performance is the only way to compare the two.
A quad i7 with HT off still beats a Phenom II when at the same clock so why not compare Bulldozer's 8 cores to Ivy Bridge with HT off?
Or for arguments sake pit the Sandy Bridge 2600K to the 8 core AMD for a more accurate/ current matchup of newer tech.
I'd like to see how BD comes out against Sandy Bridge. Hooray for AMD for being able to beat the 2 year old i7-950, but how about the 2 month old 2600K?
I'm not saying Bulldozer will fall to Intel once again, but at least show some benchmarks against a new tech chip.
That's like saying my DDR3 RAM is faster than DDR2 ram and expecting people's minds to be blown.
New tech > old tech. So why compare Bulldozer to a hyperthreaded quad that was released in 2009 when everyone is holding on to the edge of their seats waiting for BD vs SB benchmarks.