RobVos is right on.
That's why people should learn to use a TRIGGERLESS BT release.The Carters and Truballs thumb models are fine releases,but when you have that trigger on them it doesn't take long for some to want to start punching again or anticipating the shot going off.
Also the comment earlier about Dee Wilde using a wrist strap trigger release is true,but you can bet he has spent countless hrs with a true BT release.
Any release can and should be shot with pure BT but it will take time and dicipline to do it correctly.