The study you are talking about is indeed intresting but it has its flaws. For one thrust of the gas leaving the muzzel of a rifle when fired has little to do with recoil as thrust is in reality high vers low pressure against the front of cumbustion chamber in this case rifle chamber. As far as report goes a flash supressor will have the same effect as a brake, you ever notice how the muzzel blase from an AR15 with a flash supressor is far worse then a ,for example a 700 Remington varmit rifle in the same caliber? The brake design I am working with on a full auto M16 allows 20 round dumps to stay on target and in the kill zone at 50 yards. With out the brake this is not possiable. Now here we are talking about a military aplication and in this case noise is not much of a consideration staying alive and putting rounds on target is. From a hunting/ target shooting perspective noise is a concern.
If you are using a brake on your rifle then you have one more concern when hunting and this is where is your guide or fellow hunters in relation to the muzzel of your rifle. You want them behind you not out to the side or on the same plane as the muzzel. If you are not willing to take this added perspective into account then do not use a brake on your rifle!