If they abduct and torture you immediately, the chances of you stalling for x hours is pretty much non-existent. Snowden is in Russia. Arguably, no nation on the planet is better at torturing people than they are, and unlike the U.S. Russia doesn't really give a shit if the rest of the world doesn't like their methods. His interrogation would likely take minutes, not hours.

Well, my point is that there are alternate ways of ensuring the data doesn't get out, not just by being really good at resisting torture.

Other methods:

A) Alternate password that destroys the data.

B) Cyanide capsule in tooth.