From what I have read, heard and experienced personally I would say that track frames/parts are built stronger than road parts for various reasons, so I was surprised to see the photo of the imploded campag track hub, but it's true that locking up the rear wheel and skidding in the velodrome just doesn't happen unless something goes horribly wrong whereas on the street in a big city it happens with surprising regularity unless the bike has been fitted with a brake, in which case the bike would not experience the same punishment as a brakeless bike, track or otherwise. Track bikes and "fixies" do go through the same punishment on the road if both are brakeless, hence my preference for 1/8 chain and chainrings. As stated earlier, I have seen a 3/32 chainring fail under severe braking with a thrown chain resulting. If the bike has a brake, 3/32 would do nicely I imagine.
Also I liked what you said about the stresses incurred by headsets of road bikes when braking. Good point. What do you think about the track BB? Why is Campagnolo still making it and what is the difference been it and the road version?
I've included the photo of the hub and below is link to the full letter.