i don't know for sure but i would think that with that type of weight that they would have some trouble going heavy twice a week but who knows? most of those guys train the bench heavy one day and then do shoulder presses, close grips and other assistance movements on another day.
most likely. hoornstra's also a bench specialist and from what i know from talking to a few of those guys they sometimes go for one all-out bench day, a shoulder/triceps assistance day, and then a back/other day.
and yes, the man is absolutely inhuman. keep in mind he's about 100 pounds lighter than anyone else in his strength realm.