Comment by chadgeidel

As others have mentioned, I don't think "l33t" is going to help you there. Remember - a dictionary attack isn't based on "THE dictionary" (Websters et al.) but A dictionary. If I were to write a password cracker, the first thing I would do was take a list of common passwords and "l33tify" them (trivial) to create my cracking dictionary. Of course, this is still a brute force attack, and all that entails.