The content should be high quality. This is why I mentioned the story of eHow and what a terrible thing it is, and why Patrick said "Your mission, should you choose to accept it, is to create content in a fashion that scales while simultaneously ensuring that the user experience of consuming your content remains good"
He specifically told us not to create crap content.
The amazingly high quality of your content will be irrelevant if the keyword density on your page is one that Google deems to be low quality.
"""If you’re a productivity app, write a page for
“increases productivity in Healthcare”, another for “increases productivity in
Education”, “lowers cost in Healthcare”, and so on."""
^ That type of thing is pretty risky if it's one of your big strategies..
He specifically told us not to create crap content.