Chuntian Academy International

It has been said (mostly by those who are promoting grappling systems and videos) that most street fights go to the ground. But what is the basis for these supposed facts?
I don't know about you but most street fights, including bar fights and even road rage fights I have seen are over in about ten or fifteen seconds. Usually the person who lands the first good shot and follows up with several more, is the winner.
(Remember: I am talking about real fights, not drunkards falling around bar stools or "backyard" wrestling and hard horse playing ).