Is this post relevant?
Regarding your comment.
It is new SEO content here at WPW as far as I know.
Thoughts (guidelines) on how you shall format your sites pages and for example use the
inverted Pyramide style to write for the web.
SEO is also about design, formatting, navigation etc. In other words, how content is written and presented.
Conclusion based on the article:
So the way todays, SEBots index pages (content), there may be an optimal length of pages.