..., pauses or ellipses?

... had always meant a pause in the speech or writing to me for a very long time. It probably wasn't until high school that someone explained to me that they are used to show that the speech or writing has been edited. Whenever I do see them in speeches, I always wonder what they left out. I know we're not supposed to edit it to change the content, but I have always wondered if people in the big media do that. Anyway, here the rule I found, courtesy of Colorado State University
"When omitting words from the middle or end of a quoted sentence, indicate with an ellipse (…) where the omission occurs. When they occur at the end, place a period after the last word and then insert your ellipse. In either case, take care that the wording remains grammatically correct."

http://writing.colostate.edu/guides/researchsources/includingsources/quoting/omittingmiddle.cfm