In the 100th episode of Semantic Mastery's weekly Hump Day Hangouts, one participant asked about the difference between optimization of posts and pages in search engines.
The exact question was:
Does it matter whether we create content using pages or posts? I have been creating WP sites using pages and then building backlinks to them.
Recently I've come across bloggers who use posts and then they share the posts on G+, Facebook, Twitter, Pinterest, they also just link together related posts.