There's a presentation expert, Dave Paradi, who publishes a fascinating "Annoying PowerPoint Survey" every 2 years. (He is using PowerPoint interchangeably with presentation, as many people do.)
In the most recent one, he found that more than a quarter of the hundreds of people he surveyed see one or more PPT a day, and more than half said that more than half of those are "annoying."
Here's a link to the full recap of Dave Paradi's Annoying PowerPoint Survey:
http://www.haikudeck.com/annoying-powerpoint-survey-results-business-presen...