It's like this, Troy put the ball to were no but Irvin could get it, and if someone did try to pick it, they would get flagged for a PI.
The 90s team ran a timing based offense, and once troy hit that 7th , 5th or 3rd step in his drops, the ball was released to a spot that the receivers were suppose to be, and Irvin was.
These guys are different, Irvin and Troy stayed late after practice, tony and his receivers do not do that, when Practice is over they head for the showers and home, but now days they are obligated to speak to the media so that takes up time that could or should stay and work late.
The media was not as it these days back in the 90s.
Yes Irvin ran very discipline routes, he had to, because he was a whole lot slower than Owens. Irvin has said it himself that he wish he had Owens speed. Rice ran crisp routes because he was slower. I know it should not matter, but the guys that have speed most do not take the time to be disciplined route runers, because they rely on their speed, not craftiness.
But as I said earlier, Troy's balls were thrown so that Irvin could get there and if not break it up, but when romo throws his INTs they are right to the DBs, the receivers have no chance to break up the INT.
Go back and watch the games, I've said psoted this before, the past 2.5 yrs Romo's INTs have come because of him forcing the ball to Witten or Owens, and most of the time they would be double or triple teamed.