Thanks Rom....that's my understanding. If a player starts to make an "attempt" to leave the field within the allotted 3 seconds...by rule, this can no longer be a dead ball foul as long as he continues to "attempt" to leave the field. What happens if he gets off the field before the snap? No foul, right? What happens if he doesn't get off the field before the snap? Foul, right? What makes it a foul? THE SNAP!
Just my way of reading it. However, if you're sup tells you otherwise, I'd listen to him; no one works for me! Let 'him' answer to JA and RR.