Changed main area from section to div

Hi, what do people think about changing the recommendation for the main content area to be a div instead of a section?

Bruce Lawson talks about this exact thing at http://html5doctor.com/the-section-element/

"What we’ve been doing wrong is using section to ... demarcate the main content area from the nav, header, footer etc. These are jobs for div, not section."
Merge pull request #176 from keeganstreet/patch-1

Changed main area from section to div for checklist