I don't know, when I run a password cracker, I always start with a brute force pass of very short passwords. Doing so adds a negligible amount of time to the crack, and its surprising how many short passwords you'll find in systems that permit them.
First time I pointed John the Ripper to a password file it immediately started beeping like crazy. Turns out default password was no password, and 70% of the accounts were unused. Those happy quaint 90s...