Virtually all breaking news is on AP first. It takes a while for other sources to put their stories up.
Not necessarily true.
As a concrete example...
Last Tuesday, June 10th, our city had its biggest residential fire in history.
Having a police scanner going, I could report the progress of the fire, the extent, the number of alarms, etc, within seconds of their occurence on a live FR thread.
Three hours later, the AP had better check their copy and make sure they didn't have the identical 5 words, or 7 or 12 in any of their reports --- stand alone or as part of a larger paragraph.
You know, that could be fun!