Check his angled hinging. It is especially evident from the "down the line" angle.
I saw him in the Scandinavian Masters in Stockholm ca 5 years ago. On a par 3 hole. Ca 160 yards.
While the other players were punching 7 and 8 irons, Jesper punched a 9. They all seemed to have a low trajectory - rising forever and then just dying on the green,