Yeah, same. When I work at corporate I work maybe 2-3 hours a day. When I work on my personal projects I work more than 8 a day. All that time sitting around procrastinating isn't necessary to do the actual work, it is just a waste of time (not for me, I got paid the same as when I put in effort, but for the world).

Edit: And just to clarify, I always got stellar performance reviews, quick promotions and large salary bumps. Corporate just doesn't demand much from you so it is hard to motivate yourself to do the job when nobody else performs well either. This includes Google etc, at least the teams I worked at there.