Was reviewing a webcast today with some folks. Interesting to see their reaction. It was postulated that it appeared that the presenters were not in sync with the slides. Since I had inside information on the preparation of the webcast, I know that that is exactly the case — one presenter had never seen the slides, and the other had changed them up until the last minute before going on the set. Even people who were not trained presenters noted the problem.
Practice pays off. People notice.