Braves Pitching? 10 POINTS!!!!!?

What is the reason for the Braves good pitching so far this season? As a Braves fan, I will tell you that I did not expect their pitching to be this good so far with Smoltz, Soriano, and Gonzalez on the DL. Is it just that alot of players like Acosta, Ohman, Bennet, Campillo, and others are making the most of the opportunity they are getting right now? Do the Braves actually have a good bullpen or are they getting really lucky?