Your link is from two years after JP was drafted, and there's a difference from what Jaws said about JP back in 2004.
Here, Jaws says of JP, "from the waist up, he's as good as it gets, with the velocity, the delivery."
He also ranked Losman ahead of Philip Rivers...
http://www.usatoday.com/sports/football/20...er-losman_x.htm