No, they weren't. According to the "Release Notes", they were using a DES-based crypt scheme. Read up on tptacek's (http://news.ycombinator.com/user?id=tptacek) comments on the matter.
But It seems it was a DES based hashing: http://www.duosecurity.com/blog/entry/brief_analysis_of_the_...
[edit] deleted the parent post because I could not find the article I remembered (which was probably wrong anyways).