Originally Posted by Playoffs
Nope. NFL Network uses a single source for unofficial times, and it's not agents/college coaches/relatives.
"Official" times are started on first movement -- any movement, even if it it not forward. Some guys move their off hand first, or rock backward. That is why "official" times are typically higher, very rarely lower.
Track meets, especially the most prominent meets like the Olympics haven't used hand-held timers for decades simply because they are less accurate, more inconsistant, and less reliable than electronic timers. Their is but one reason to continue with this archaic technology in events like the Indy Combine which is to record faster times.