Sun Who,
It is wrong to suggest torture doesn't work. It would be better to suggest it doesn't always work. As an aside, you imply (apols if I got that wrong) insight about the 'rarity' of solid int - can you quantify that?
Torture doesn't work because, even if it gets actionable intelligence (rare) any gains are more than offset by the negative aspects outlined in my previous post. This is the reason torture is not a tool of the thinking man.