They have the size of power without being handicapped!
Males ~25-28' at the withers and 85-130#, with most being 90-115#.
Females ~24-27" at the withers and 75-110#, with most being 80-100#.
And should an encounter ACTUALLY OCCUR with no bite suit (which means the man will have greater mobility and no protection, they can now move around inside a home quickly and use the furniture to dodge and weave around. Should an encounter occur outside, we now have even greater mobility, and the benefit of the 100# dog becomes even more pronounced. In both cases, without a bite suit, the 100# dog is way more capable than the quality big dog that unwilling (exhausted, hot) or unable to engage for whatever reason...meanwhile, the quality 100# agile dog will be on you like cat hair with static electricity...and you cannot get it off...and without a bite suit to protect you or a handler to assist you, if the dog is bred right, its power will be more than you can handle. These 100# dogs control 100-400# wild boars, and the man that has to fight such a dog is incapable of being a threat to anyone else as a result. The threat is
I understand there are trainer that have been bit with and without bite equipment on in a TRAINING situations where handlers helped get the dog off you OR that have gotten bit while doing kennel chores OR when working in obedience, but that is NOT the same as getting attacked by a protection dog that really has the intensity to protect against an intruder that has no equipment...so to comparing those experiences to protection engagement with no equipment against a 100# dog that can move like a mongoose...and has VERY significant power...many times 80-90% of the strength, but just less mass as the 140-150# dogs...but much more speed, agility, and stamina...well...it's a bad comparison really. How do I know this...simple. We have seen what happens when animals are in real combat. While size is a factor, intensity combined with determination is repeatedly the most important factor to depicting the outcome...be it with a man or a hog...or whatever. If all else was equal, the bigger animal may have an advantage, but the problem here is all else is never equal.
Time and time again...throughout history...working mastiffs and working bandogs BOTH have been in the 80-120# range...very few high stress working dogs have ever exceeded the 130# mark. There are a few anomalies here and there of course. I have seen a few, worked a few, and even owned a few...but they are VERY rare...but the problems with them are...1) will they reproduce themselves, 2) what is their stamina, 3) what is their agility, 4) their heat tolerance, 5) how long is their working life-span, and 6) long term health/soundness.
It has been said, it isn't the size of the dog in the fight, but the size of the fight in the dog. Truth is...it is both. The key here is finding the right balance for your personal task...and then being honest about it. If you like big dogs, that's cool...I have no problem with it, but to say they out-perform smaller 100# dogs, well, that just isn't true UNLESS you quantify the statement as I did in my opening statement.
For me, as a person that wishes to produce a dog that can do sentry work, personal protection work, and also hog catch work...I cannot give up any significant amount of heat tolerance, agility, and/or stamina...especially considering that I live in the hot climate of Mississippi. A 100# dog that is in shape is a big dog. Fat 100# dogs that are really 70# dogs that are 30# overweight do not count at 100# dogs, and are disqualified from this conversation. That is not what I am talking about here. I am talking about true 100# lean dogs. Even solid 85-90# dogs, like Thorneywood's Terror are more than sufficient if they are of good quality.