Sorry if this was known already and I just missed it, but looking at the character select screen on the new blizz website the barb doesn't look as old, nor does he appear to have a beard anymore.
From far away he looks younger I suppose, but if you look closely you can see his old man beard and weary; "I've seen stuff that you couldn't imagine" face.
http://us.battle.net/d3/en/media/screenshots/?keywords=&view#/interface-mainscreen-basic-party
Also he's totally old, just look at those old person flab rolls blocking his rockin' abs.
I think the bigger question is, why did they replace the wizard with David Bowie?
An even BIGGER question is, why DIDN'T they replace the wizard with the only thing cooler than David Bowie: the Sandman?
http://imageshack.us/f/192/unledyhz.jpg/