yes bob rock has mentioned tht a couple of times...that in a way it was destiny for him to produce black album...in a way i think bob rock doent really like bj...because sww and nj were mostly bruce fairbarn and ktf wasnt a huge success for this eras standards...he considered jon mostly a businessman than an artist, but even if i believe jon has made many mistakes he has matured nicely in comparison to the other band members he mentioned with the exception of hetfield who is supercool