Bill de hÓra’s What a DVCS gets you (maybe) has one of the clearest explanations of why DVCS is superior to centralized VCS:

But once you accept this model of having your sandbox under version control, a lot of the pain (and fear) of dealing with branches evaporates. Passing around changesets and patches becomes normal and logical.

After using a DVCS for years (Codeville), I don’t think there’s any need for “maybe” in this post’s title, either. DVCS is superior, plain and simple.