On "How to Create Effective Facebook Wall Posts"

This morning I read this post called
How to Create Effective Facebook Wall Posts by Courtney Boyd Myers. The
post summarises the results of a research performed by Buddy Media; the research
was about the "Likes" and comments on all Facebook Wall Posts. My notes on this
are:

• Marketers work Monday through Friday but Facebook is always available.
• Post with up to 80 words lenght have a higher engagement raten than longer posts.
• Engagement rates are 3 times higher for posts that used a full-length URL, rather
  than a URL shortener.
• Posting outside normal business hours icreasees the engagement rates.
• Engagement rates on Thursday and Friday are higher than other days of the week.
• Keywords as "Events" or "Winning" were associated with promotions that had the highest
  engagement, while “buy,” and “shop” had low engagement.