Good Portis stuff from Washington Times blog

[GTripp0012]

One of the big reasons that the 40 yard dash is overrated is that speed is the first thing to go...usually by 26 a guy has put at least a tenth of a second or two on his 40, and that's the age at which said player is just becoming competent at his position.

So while these guys all time well at the combine, by the time they actually become starters at their position, won't be running faster than any of the guys they outtimed.

Thus, teams like the Raiders, who value speed above all else, don't win, because their players can't run faster than the other team's players.