As reported earlier by 9to5Mac, the folks over at TLDToday posted a video showing an updated GeekBench score of the A6 chip in the iPhone 5. According to earlier test results (prior to the release of the iPhone 5), GeekBench had showed a clock speed of 1.02 GHz however that seems to have been only the beginning.
— Jonathan – tldtoday(@tldtoday) September 26, 2012
Check out the video above indicating the processor may dynamically clock upwards to 1.3 GHz. The extra speed in the processor would certainly help justify the increased speed in the iPhone 5 over its competitors.