I too watched LT play many times in the old stadium. Most statements here have some truth to them.
He did change the game. OCs were not prepared for the new LB.
He did take plays off. He would trot after RBs on occasion.
At other times he would run down a RB from behind all the way across the field with a fierce pursuit. People concentrate on his sacks, but this part of his game was huge.
The thing is...when it was 3rd and 7 in the 4th quarter and the Giants needed a play, the crowd would start the "LT" chant, and it seemed more times than not, he would devastate the opposing QB. Everyone knew it was going to happen and there was little that could be done to stop it.