Simply not true. See, for example, this Wired article by Bruce Schneier. See also tools such as John the Ripper.
You took my reply severely out of context.
Quoted from the link you sent.
"How good is all of this? Eric Thompson estimates that with a couple of weeks' to a month's worth of time, his software breaks 55 percent to 65 percent of all passwords. (This depends, of course, very heavily on the application.) Those results are good, but not great."
Like I said, this strategy is simply not even remotely practical for almost all accounts. The user who is complaining about his account being hacked said that it was used to send out spam. Does that end result really seem worth a 55% chance that 2-4 straight weeks of using a computer for no other purpose than guessing his password will actually work?