I prefer the "quick stop" method when possible, it's the second method on the US Sailing page I've attached. If you watch the video you'll see it looks like they are gonna run the victim down as Sailormon mentioned. I also carry a floating line in a throw bag that's readily available on the rail which can be thrown pretty quick and will trail around to the victims back like picking up a waterskier if you turn quick enough.
http://www.sailingusa.info/man_over_board.htm