Here is my issue with 40 times.

Anyone who has run track know that the biggest thing you can do to improve your time is getting off the block better. And that is the issue. When was the last time you saw a Wr lineup and take the sprinter position? If I was a GM I would clock the Wr's coming from a start standing the way they stand in a game. And have them run motion then turn up on the snap count. That would be a number with more value IMO.