Here's why you should always whip the ball into the box on a corner kick: it just might go directly into the goal.
That's what David Beckham did for the LA Galaxy, he puts the ball in at pace towards the near post where a teammate is making a run, but if the player misses the ball or the defender can't get to it, then it very well might go right into the goal.
At the near post, with all the players charging in to win the ball, it's hard for the keeper to see and make the save. Goal. Take a look.