i was wondering the same thing but then i thought about it.... the question of have you got everyone's bitcoins in no longer personal to the guy asking for his own bitcoins. i think karpeles just switches off because its no longer personal & more what a reporter would ask.
the guy should have just kept asking for his own bitcoins
Surely they know if they have lost funds or not tho. Going to have to tell people at some point either way and just seems like they are doing it in a way to piss people off whatever the out come is good or bad.