It's rather telling that many of the comments disputing the author's thesis about the root cause of procrastination read like the Top 10 Things Procrastinators Tell Themselves. Almost all of the alternative causes mentioned have nothing to do with them, because that would mean admitting a flaw, but have to do with the situation, which of course is beyond their control and therefore not their fault.
Anyway, this article really hit home for me. I will definitely be picking up a copy of "The Now Habit".