If you watched the games, most winning teams switched from zone to man as well as a mix in some situations during the game. Nothing wrong with zone because it's a team effort. If one part breaks down its easy to beat. At this level, and with such disparity in kids development, different situations call for different strategies. If you watch or have played the game in college, most use a mix or switch between man/zone to confuse the offense. Obviously, as you can see, zone does work.
