There is a distinction. In his mind gang tackling could be the current gen prescripted/canned 2 player animation. In our minds we could think what you are thinking.
Taking it further. We might have in our mind, ohhh real gang tackling would mean I do not have to WAIT for the RB to come out of an animation when he is being tackled by another defender, I can jump on while that defender is there too, UNLIKE current madden. He may think current madden does gang tackling well. But that's not what's in our minds when the word gang tackling is throw around. So yeah there could be a distinction and a big one at that. What he means by it in that preview we do not know. We do not know if he means current gen madden gang tackling OR what we visualize as real gang tackling. That's all.