This is a pretty backhanded thing to say. IMO, knowing a password prefix makes any secure password no less secure. If anything, it makes it more secure to the uninitiated who don't know the prefix. And for those who DO know the prefix, and they know/cracked the admin password, then they would have probably gotten into the box eventually anyway.
@hdo26 - I think he's trying to give you **** about divulging this prefix. Still not 100% sure why, though. Security through obscurity is not security.
I, for one, would like to say thanks!