Are we starting a new decade?

I’ve seen in a few places that we’re starting a new decade in 2011. Are we? I’m inclined to say that we aren’t, because if we were, the decade would end in 1920, so that year wouldn’t be a part of the “20’s”. Then again, there’s the argument that, since there was (allegedly—who can trust the records from that time?) no year 0, one should start counting from 1, as in 2001 to 2010. What are your thoughts?