I'm in Act 3 Inferno and lol no. Barbarian = far to gear dependent so I'm farming act 1/2 for money. It's going to take ages.
I've got a Demon Hunter on the up though (I started a Wizard and hated it), but I WILL beat Inferno with the Barbarian. It'll take longer, but once geared out, I can't see any class being as good.