I think one of their "lessons learned" from Watergate was that every story put out there that accuses the govt - and specifically the Exec Branch - of untoward or illegal activity must be thorough, fact-checked and removed from all semblance of attack or bias.  

They're taking the "just the facts, ma'am" approach, which is very smart as Bush just got re-elected, and as there's still a mentality among many of our countrymen that torture is justified because strange, brown, tuban-wearing men might walk into the Mall of America any day now with chemical weapons obtained from Saddam's former gov't and gas teenagers hanging out in the food court.

This article feels like they're slowing building their case.  I'll be interested to see what else they produce in the weeks to come.