PHPBB after hack password analysis

I was reading this article at darknet .it provides a analysis of the PHPBB user password.It means what kind of password general users keeps.The analysis has some strange result stating that most of the password are very common and you can easily find them online here.
I have not used PHPBB much and i dont remember if it forces a miminal password lenght or complexity.
you can read the full article on it here.
-SecGeek