Fleetus,
I want to tell you that while I have had the beginnings of target panic, it was always staved off by making myself hold longer.
You are dead on the money about shooting a bow that is not too heavy for you. While it has been stated that target panic is the fear of missing, or shooting in front of a group. I think it is a the loss of control, most often started by the inability to hold the bow at full draw until the brain and the eye have agreed that the picture is right, better stated, the spot has been lock into the targeting system.
What people fail to understand, is the fact that the bow will shoot the same way everyday it is drawn. The archer changes, he/she gets fatigued, family, job problems, or illness. Each of these things may force us to lose physical strength, and/or concentration.
If it takes me three seconds find my mark once I reach full draw on a good day, what happens on a day when my concentration is not up to par. I know this is not as applicable to Gap Shooters, but very important to instinctive shooters.
I shoot very well when the shot has to be quick, but I didn't not get that way by practicing quick shots. I got that way by taking my time, now when I practice I make myself take an extra two or three count. My shooting has improved so much, it frightens me.
Now when I draw on game, I feel no hurry to "get er done". I repeat the montra, I am in charge, I shoot when I am ready. It works for me...