IMO, forgiveness is pretty hard to define, and not everyone will agreee on the definition. What one guy thinks is a forgiving rig, someone else may think is quite touchy. I have two bows that have exactly 7" of brace height. I shoot them better than some other bows I have owned with 1/2 to 2" more brace height. It probably doesn' t make sense, but that is the way it has worked out. I have shot some very popular bows that many guys tend to call forgiving, only to find my " obsolete" bows to shoot better for me. Why? Beats me![&:]

To give you a more direct answer to your question, though.
I have been shooting a bow that has a 7 1/4" brace height that is 34" axle to axle. I shot it for close to a month with a Starhunter shoot through rest on it. Carefully tuned and checked for fletch clearance, also using feathers. Then I switched to a Whisker Biscuit (Aluminum size) that is modified to work like the new QL series. After completing the tuning process, I found no difference in forgiveness between the two rests. The bow will put every shot where it is supposed to go, unless the idiot behind the bow does something to interfere with a good shot. I personally do not find the bow less forgiving than it was with the shoot through rest, or less forgiving than some of the 40" + axle length, 9' + brace height bows that I have owned in the past. These results are not necessarily typical of a wider cross section of shooters. Your results may vary![&:]