Where does he show burst?
Off the line...which is great, because it'll help him to not get stuffed and pushed off his routes.
Not that I expect his highlight film to show him dropping balls, but he goes over the top of his defender numerous times and comes down with it...those are the toughest that a tall WR has to make routinely (not diving with one hand, like Landry).
I just don't find anything overly impressive on his film other than his possession ability.
I'm not exactly blown away like I was when I saw Courtney Gardner's film, but I'm sure impressed with his measurables and the brief highlights that I've seen, considering he just picked up the game.