A 12 minute "go" when you ride the subway to work may cultivate some awareness, namely that you're either restless, lazy, fearful, judgmental, easily distracted or unable to concentrate -- but this is only the first step towards doing something about it.
Think of the last time you showed up to meet friends at a cool new restaurant and beat them there. Did you check out the decor? People watch? Peruse the menu? Maybe, but as soon as the tiniest bit of social anxiety or discomfort creeps in, out comes the iPhone...
They said it about Hicks, and they said it about Carlin: they were not only comedians, but great thinkers. They were cultural commentators, who just happen to pepper in some d**k jokes for good measure.
As much as I wanted to hang on to the barrage of stimuli and the thoughts tumbling through my head to mull over later, I killed that option bit by bit with every tap on the screen. I couldn't resist the profound urge to capture the experience -- I just went about it the wrong way.