Harvard Biz School Pitch Deck Study

Recent Harvard Business School study of 200 pitch decks: 
https://docsend.com/view/p8jxsqr

Here's a TechCrunch story on the above, with lots of comments:
http://techcrunch.com/2015/06/08/lessons-from-a-study-of-perfect-pitch-decks-vcs-spend-an-average-of-3-minutes-44-seconds-on-them/

Pitch deck guidelines:
http://www.sketchdeck.com/article/writing-a-great-pitch-deck/