That, as I see it, is the problem – not twitter or 140char limits or any of the other stuff Dustin raises, it's the desire for external validation (and I can't help but imagine him furiously clicking reload on his own blog post to see how fast his Kudos score is climbing…)
My takeaway/advice is - try to recognise when you're being manipulated by gamification techniques and choose to be aware of them and ignore/resist them when it's in your better interest.
Does anybody _really_ think Picasso would have painted iPad trifles for immediate social media validation, instead of starting and completeing Garçon à la pipe? I _seriously_ doubt that - from Wikipedia: "At the time of his death many of his paintings were in his possession, as he had kept off the art market what he did not need to sell. In addition, Picasso had a considerable collection of the work of other famous artists, some his contemporaries, such as Henri Matisse, with whom he had exchanged works."
Picasso _didn't_ paint for the twitterati - he painted for Picasso. Dustin should write for Dustin - not for Twitter. He's allowing himself to become distracted from achieving what he wants at achieve. That's not Twitters fault. Procrastinators gonna procrastinate (he said hypocritically while wasting time on HN…)