This is called anecdotal evidence and... Almost all my friends are hawt females... this must mean the world is almost exclusively populated by hawties right?.
Let's let a Developer answer your question:
"Skipping the extreme outlier of the Epic Sword of Shadows (we got a little carried away there, didn’t we?)"
Extreme outlier means it's wielded by a statistically small number of the player base, inside of what everyone acknowledges is a small subset of players who actually play epic. let alone grind them enough to get an ESoS.
So your anecdotal "almost all barbs I know" is obviously a fluke of who you run with and I'm being generous not doubting that "almost every" barb you know isn't A) an exaggeration B) only 2 actual barbs.
In any case I can't imagine how Effed up this game would be if they balanced everything around players who are to the right of a decimal place in the overall percentage of server population.