of course, but also as someone who’s only trained for a little over a year gaging stuff like that is very diffcult, so seeing where others’ lans have come from is always helpful (though copying bj is probably not a good idea for most people).
i assume that if bj never really trained his squat above 600, then the 4x600 would have been a fair amount of effort if he had been half squatting, but at a quarter squat who knows…