They are just figuring this out now??? 
I remember always yelling at whoever was throwing the ball to me to throw the dam ball.
5-5-2005 Study Finds Kids Can't Hit Slow Pitches
You're throwing a ball for a toddler to smack with a plastic bat. You toss it gently, slowly, to make it easier. He just can't hit it.
It's because you throw too slowly, a new study finds.
Kids' brains aren't wired for slow motion.
"When you throw something slowly to a child, you think you're doing them a favor by trying to be helpful," said Terri Lewis, professor of psychology at McMaster University. "Slow balls actually appear stationary to a child."
Add a little speed to the pitch, Lewis and her colleagues suggest, and the child is able to judge its speed more accurately.
I remember always yelling at whoever was throwing the ball to me to throw the dam ball.
5-5-2005 Study Finds Kids Can't Hit Slow Pitches
You're throwing a ball for a toddler to smack with a plastic bat. You toss it gently, slowly, to make it easier. He just can't hit it.
It's because you throw too slowly, a new study finds.
Kids' brains aren't wired for slow motion.
"When you throw something slowly to a child, you think you're doing them a favor by trying to be helpful," said Terri Lewis, professor of psychology at McMaster University. "Slow balls actually appear stationary to a child."
Add a little speed to the pitch, Lewis and her colleagues suggest, and the child is able to judge its speed more accurately.