Nigel,
I understand "holding" the call until the wrestlers break or go out of bounds but the call I can't understand is waiting until the end of the period. If both westlers are in the same position for 15-20 seconds and the ref holds the call until the end of the period, it seems the O wrestler is at an diadvantage. The O wrestler is not increasing his motion because he thinks since no points have been awarded, he still has control. In my opinion, it is either an escape or it is not. I think most fans react to the point at the end of the period more than the other two examples. In a tie match, the O wrestler would assume if he stays in the same position, he will go into overtime.If the ref waits until the end of the match and awards the D wrestler 1 point, the O wrestler has lost the match and in my opinion is at a disadvantage. Again, I think it is either an escape or it is not.