"Great" content and long-form content are not the same thing. In this post, Rand explains the difference, the reasons for the correlations, and an alternative path to making content that accomplishes your goals and those of your audience.
Cendrine Marrouat - cendrinemarrouat.com:
I almost didn't read this post, because I was expecting a boring spiel on why long-form content rocks.
Well, I'm glad I didn't follow my gut feeling. Rand Fishkin echoes what I have been saying about blogging for a long time. Length is irrelevant to success. It's much more important to focus on usefulness and quality. In a nutshell, what matters to your audience.