Re: Your dog is more popular than your daughter
@ ZSn "Not sure", agree.
How can they crack GoodLuckGuessingThisPassword by brute force? Considdering letters only: one has to guess max 52^23=2.8E42 times which takes centuries. (or crack a PW of 140 bits entropy).
Perhaps a Markov chain attacks works with these words. Might gain a factor 3(?) up front, but with the same performance for an exhaustive serach.
Even if a combine-words-in-dictionary attack on a passphrase was undertaken with a 7776 word Diceware dictionary: it would take max 7776^5=2.8 E19 guesses. Or at ~20 billion/sec (if possible for phrases) some 40 years on average.
I have not seen math for non-random phrases, that could be attacked by grammar based approaches. Perhaps they know how to do that?