I don't think Steve Smith was considerably faster. Kendall runs about 4.45, I would guess Smith was like 4.40-4.37 or so. And honestly top end speed means less than people think. Most corners get beat deep either because they missed the jam on the line, the receiver ran a really good route, or the QB put the ball in a great spot not necessarily because the receiver was much faster. Kendall's route running is great and I don't think any corner wants to fins himself covering him on a post-corner or slant-go. With 4.4 speed, Kendall won't go by everyone but guys like Anquan Boldin and Larry Fitzgerald straight up smoke guys despite running in the 4.5's or 4.6's. Speed is important but it isn't everything.