I belive the "tug" on the backcast leads to problems,,,,,when you feel the line "tug" on the rod,,,it is too late,,,the line is already falling towards the ground and you have introduced "slack" into the backcast. A very straight line horizontal backcast is the most efficient position for the line to be when we start the forward cast. The instant the line is unrolled into a horizontal position it begins to fall.
The backcast should be in a horizontal "J" or candy cane shape when we begin the slow acceleration into the forward cast. If you hear the dreaded snap or pop of the leader,,,,you have accelerated into the forward cast too quickly with excessive force or power.