Nonsense! Having a commanding posture is quite independent from height. Comments like that say nothing one way or the other. It has more to do with bearing and the way one holds oneself. There are plenty of well-muscled near-giants who need not open their mouths before you realise they're not natural leaders, while history records many short individuals who nonetheless radiated commanding authority and power with their every movement. Several of the key nomadic warleaders such as Temuchin or Timurlane, not to mention our own more recent Napoleion would tend to indicate that command is not a function of height.
Otherwise professional basketballers would rule the world.
Well .. I'm afraid that most shorter "leaders" were close to being tyrants and ruled with an iron thumb - most had an inferiority complex - and tried to compensate by acting superior = Napoleon.
I believe Jesus' appearance was so commanding in stature and attitude that most people were in awe of his presence. Remember .. when Jesus walked on the earth - the blood of GOD was flowing in his veins - and that alone would have made him a standout kind of person.
You can believe He was a little short guy if you want - but you'll never convince me.