There are only 5 of the 52 attributes that are determined by the hard data from the combines and pro days. They are SPD, STR, AGI, ACC, and JMP. That is 5 of 53 ratings! The combines are what the scouts use...so why not us? It is true that not every player's talents translate...but why is that? Running those times in shorts shows the POTENTIAL for those attributes. Players more than often do not display them for other reasons besides not having the ability to do so. It could be because they are out of position due to lack of recognition skills. It could be because they can't break tackles. It could be because they can't catch the ball! The simple fact is running those drills is the ONLY way we have to standardize everyone. One player isn't running 40 yards and the other 50 yards...they are the same. We have 48 other ratings to determine that other stuff like ELU, BCV, CIT, etc...
As for Taylor Mays...you are dead wrong on his lack of speed. Taylor Mays was notoriously a FREAK at USC. Read a scouting report or two. In fact I will even provide you with one per NFLdraftscout.com:
"
Read & React: Good key-and-diagnose skills. Aggressive in run support, but disciplined and rarely out of position. Understands his role as the last line of defense and generally takes good angles to minimize big gains by opponents, but struggled some as a senior in this area. Mistakes typically occur when he overruns the play and doesn't account for the runner's cutback agility.
Man Coverage: Faster in a straight line than he is quick in a short area. Struggles laterally and loses a step in his transition due to tight hips. Rare recovery speed. Is a rangy defender and can blanket most deep receivers.
Zone Coverage: Controlled aggression in coverage makes him well suited for a zone scheme. Sees the action and reacts quickly. Loses a step in transition, but accelerates smoothly. Good change-of-direction skills. Reliable open-field tackler. Intimidating hitter over the middle.
Closing/Recovery: Rare straight-line speed for a man his size. Reads the action quickly and has great burst to close. Times his leaps well and uses his long arms to bat away passes. Would rather go for the big hit than compete for the ball. Has just five career interceptions -- three as a freshman -- despite 49 career starts.
Run Support: Has played deep in a zone scheme in the past, but flashes outstanding ability in run support. Good key-and-diagnose skills. Can elude blocks, but is willing to take them on and can discard due to his upper-body strength and long arms. Big hitter who runs downhill toward the line of scrimmage.
Tackling: Reliable open-field tackler. Breaks down well to make the secure stop. Explosive hitter who loves to intimidate opponents. Lowers his shoulder into the ballcarrier and can separate the football from the man. Leads with his shoulder on big hits, failing to wrap up securely.
Intangibles: Physically imposing athlete with good overall musculature. Freakish combination of size and straight-line speed. Carroll has publicly characterized Mays as USC's fastest player; has reportedly timed in the 4.2s at 230 pounds. Good bloodlines. Father, Stafford Mays, was a defensive lineman in the NFL (St. Louis Cardinals, Minnesota Vikings) from 1980-1988."
His physical attributes were never in question. Watch this vid of him running down Jahvid Best for a loss...laterally.
http://www.youtube.com/watch?v=26rLxHZpiKQ
As for Terrell Owens and inflating attributes, that is exactly what we are trying to fight. A poor receiver with marginal catching abilities should have that reflected in the game. Why do you think TO is without a job right now? Too many drops! He isn't that fast (and never really was...only ran a 4.46 in his prime...not a 4.3 or anything) and it should be reflected in the game. If you want to make him good, don't overrate him...rate him as he IS. Make his route running better or his elusiveness. Sometimes I think people forget why we even have those other 48 ratings because EA doesn't even know how to use them!