I use Git to good effect in a fairly traditional corporate environment. We're much better off since switching over from SVN.
Never mind the 'distributed' part - the big challenge for source control in a traditional setup is when two people have both modified different parts of the same files, and the second guy goes to check in. Git is much better at handling conflicts than SVN is - conflicts that would cause real pain in SVN often merge smoothly in Git.
It's also much better at handling branches, e.g. a release branch. Remember 'tree conflicts' in SVN? Not an issue in Git.
Git is a better SVN, as well as being a distributed source control system.