Smaller men like myself aren't completely helpless however. I've never actually lost a fight unless I was outnumbered. I attribute this to the complete lack of training on the part of everyone I've ever fought on the street. I discovered that very few people in the real world have any defense against a low side kick to the knee.
However, that doesn't belie your point. The larger man has the advantage, every time. Luckily, I live in Texas, and I'm rarely without my Spiderco Harpy (truly wicked knife) even in a bar, and most of the time I'm carrying a .45acp, because I don't believe in equality. I want superior firepower.
This latter part isn't directed towards you, but to others in the thread. I'm somewhat surprised to see the complete contempt that many hold for smaller men. The list of perjoratives I've read from "banty rooster" to "little Napolean" really say it all. Nary a mention of the now grown up school yard bully who still likes to throw his weight around.
I'm on the upper end of middle-sized (5-10, 200), so I guess I'm not subject to either of the complexes you mention.
Speaking of Napoleon complexes, I had an employee once (maybe 5-3, 130) who would every Saturday night go to the local biker bar, get drunk and pick a fight. This was his idea of a great Saturday night, even though he lost most of the fights.