When I saw the pillow get tossed at the little boy, I cringed too. Couldn't help it. Toss was a bit too fast for my liking and the pillow didn't seem all that soft.
Then the little boy chuckled. He loved it. Because he knew the toss was a sign of love from his dad.
I don't think it's necessarily strictly a sign of the difference between moms and dads. I'd bet a lot of dads would cringe for that first second. Maybe more dads than moms would have noticed the child's reaction and saw he enjoyed it.